diff --git a/Application/CommentService.cs b/Application/CommentService.cs
index 279be44..df6249d 100644
--- a/Application/CommentService.cs
+++ b/Application/CommentService.cs
@@ -8,19 +8,21 @@ namespace Application
   {
     private readonly ILinkRepository _linkRepository;
     private readonly ICommentRepository _commentRepository;
+    private readonly ICurrentUserProvider _userProvider;
     private readonly IData _data;
 
-    public CommentService(ILinkRepository linkRepository, ICommentRepository commentRepository, IData data)
+    public CommentService(ILinkRepository linkRepository, ICommentRepository commentRepository, ICurrentUserProvider userProvider, IData data)
     {
       _linkRepository = linkRepository;
       _commentRepository = commentRepository;
+      _userProvider = userProvider;
       _data = data;
     }
 
     public Guid PublishComment(PublishCommentCommand cmd)
     {
       var link = _linkRepository.GetById(cmd.LinkId);
-      var comment = link.AddComment(cmd.Content);
+      var comment = link.AddComment(_userProvider.GetCurrentUserId(), cmd.Content);
 
       _commentRepository.Add(comment);
 
diff --git a/Application/ICurrentUserProvider.cs b/Application/ICurrentUserProvider.cs
new file mode 100644
index 0000000..40560a7
--- /dev/null
+++ b/Application/ICurrentUserProvider.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace Application
+{
+  public interface ICurrentUserProvider
+  {
+    Guid GetCurrentUserId();
+  }
+}
\ No newline at end of file
diff --git a/Application/LinkService.cs b/Application/LinkService.cs
index 015a607..abda42b 100644
--- a/Application/LinkService.cs
+++ b/Application/LinkService.cs
@@ -10,11 +10,13 @@ namespace Application
   public class LinkService
   {
     private readonly ILinkRepository _linkRepository;
+    private readonly ICurrentUserProvider _userProvider;
     private readonly IData _data;
 
-    public LinkService(ILinkRepository linkRepository, IData data)
+    public LinkService(ILinkRepository linkRepository, ICurrentUserProvider userProvider, IData data)
     {
       _linkRepository = linkRepository;
+      _userProvider = userProvider;
       _data = data;
     }
 
@@ -25,7 +27,7 @@ namespace Application
     /// <returns></returns>
     public Guid PublishLink(PublishLinkCommand cmd)
     {
-      var link = new Link(cmd.Url);
+      var link = new Link(_userProvider.GetCurrentUserId(), cmd.Url);
 
       _linkRepository.Add(link);
 
@@ -49,7 +51,7 @@ namespace Application
     private IQueryable<LinkDTO> LinksDTO()
     {
       return (from link in _data.Links
-              join comment in _data.Comments on link.Id equals comment.LinkId into comments
+                // join comment in _data.Comments on link.Id equals comment.LinkId into comments
               orderby link.CreatedAt descending
               select new LinkDTO
               {
@@ -58,7 +60,7 @@ namespace Application
                 CreatedAt = link.CreatedAt,
                 UpvotesCount = 2,
                 DownvotesCount = 4,
-                CommentsCount = comments.Count(),
+                CommentsCount = _data.Comments.Count(comment => comment.LinkId == link.Id), //comments.Count(),
               });
 
       // return _data.Links
diff --git a/Apps/Api/Startup.cs b/Apps/Api/Startup.cs
index 83430b7..cbd403a 100644
--- a/Apps/Api/Startup.cs
+++ b/Apps/Api/Startup.cs
@@ -18,7 +18,8 @@ namespace Api
     // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
     public void ConfigureServices(IServiceCollection services)
     {
-      services.AddHNServicesInMemory();
+      // services.AddHNServicesInMemory();
+      services.AddHNServicesEF();
       services.AddControllers(options =>
       {
         options.Filters.Add<CustomExceptionFilter>();
@@ -35,6 +36,7 @@ namespace Api
     // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
     public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
     {
+      app.UseHNDatabaseMigrations();
       app.UseOpenApi();
 
       if (env.IsDevelopment())
diff --git a/Apps/Api/appsettings.json b/Apps/Api/appsettings.json
index d9d9a9b..55f4a8f 100644
--- a/Apps/Api/appsettings.json
+++ b/Apps/Api/appsettings.json
@@ -6,5 +6,8 @@
       "Microsoft.Hosting.Lifetime": "Information"
     }
   },
+  "ConnectionStrings": {
+    "Default": "Data Source=../Website/hn.db"
+  },
   "AllowedHosts": "*"
 }
diff --git a/Apps/Website/Controllers/AccountController.cs b/Apps/Website/Controllers/AccountController.cs
new file mode 100644
index 0000000..5b02ec5
--- /dev/null
+++ b/Apps/Website/Controllers/AccountController.cs
@@ -0,0 +1,87 @@
+using System.Threading.Tasks;
+using Infrastructure.Identity;
+using Infrastructure.Models;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Website.Controllers
+{
+  public class AccountController : BaseController
+  {
+    private readonly UserManager<User> _userManager;
+    private readonly SignInManager<User> _signinManager;
+
+    public AccountController(UserManager<User> userManager, SignInManager<User> signinManager)
+    {
+      _userManager = userManager;
+      _signinManager = signinManager;
+    }
+
+    [AllowAnonymous]
+    public IActionResult Register()
+    {
+      return View();
+    }
+
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    [AllowAnonymous]
+    public async Task<IActionResult> Register(RegisterViewModel cmd)
+    {
+      if (!ModelState.IsValid)
+      {
+        return View(cmd);
+      }
+
+      var user = new User { UserName = cmd.Username };
+      var result = await _userManager.CreateAsync(user, cmd.Password);
+
+      if (!result.Succeeded)
+      {
+        ModelState.AddModelError(nameof(RegisterViewModel.Username), "could not register");
+        return View(cmd);
+      }
+
+      Success("Your account was created, you can now login");
+
+      return RedirectToAction(nameof(Login));
+    }
+
+    [AllowAnonymous]
+    public IActionResult Login()
+    {
+      return View();
+    }
+
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    [AllowAnonymous]
+    public async Task<IActionResult> Login(LoginViewModel cmd)
+    {
+      if (!ModelState.IsValid)
+      {
+        return View(cmd);
+      }
+
+      var result = await _signinManager.PasswordSignInAsync(cmd.Username, cmd.Password, true, false);
+
+      if (!result.Succeeded)
+      {
+        ModelState.AddModelError(nameof(LoginViewModel.Username), "Could not sign you in, please retry");
+        return View(cmd);
+      }
+
+      Success("You're now logged in");
+
+      return Redirect("/");
+    }
+
+    public async Task<IActionResult> Logout()
+    {
+      await _signinManager.SignOutAsync();
+      Success("You're now logged out");
+      return Redirect("/");
+    }
+  }
+}
\ No newline at end of file
diff --git a/Apps/Website/Controllers/CommentsController.cs b/Apps/Website/Controllers/CommentsController.cs
index bf6076d..f35d381 100644
--- a/Apps/Website/Controllers/CommentsController.cs
+++ b/Apps/Website/Controllers/CommentsController.cs
@@ -1,5 +1,6 @@
 using System;
 using Application;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Website.Controllers
diff --git a/Apps/Website/Controllers/HomeController.cs b/Apps/Website/Controllers/HomeController.cs
index dbcfdca..a9ccc77 100644
--- a/Apps/Website/Controllers/HomeController.cs
+++ b/Apps/Website/Controllers/HomeController.cs
@@ -3,12 +3,14 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
 using Website.Models;
 
 namespace Website.Controllers
 {
+  [AllowAnonymous]
   public class HomeController : Controller
   {
     private readonly ILogger<HomeController> _logger;
diff --git a/Apps/Website/Controllers/LinksController.cs b/Apps/Website/Controllers/LinksController.cs
index e18a9f6..4c18498 100644
--- a/Apps/Website/Controllers/LinksController.cs
+++ b/Apps/Website/Controllers/LinksController.cs
@@ -1,5 +1,6 @@
 using System;
 using Application;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Website.Models;
 
@@ -16,6 +17,7 @@ namespace Website
       _commentService = commentService;
     }
 
+    [AllowAnonymous]
     public IActionResult Index()
     {
       // return Forbid();
@@ -23,6 +25,7 @@ namespace Website
     }
 
     [HttpGet("{controller}/detail/{linkId:guid}")]
+    [AllowAnonymous]
     // [TypeFilter(typeof(CustomExceptionFilter))] // Permet d'appliquer un filtre ASP.Net
     // sur une action uniquement (valable pour toutes les actions d'un controlleur si appliqué sur ce dernier)
     public IActionResult Show(Guid linkId)
diff --git a/Apps/Website/Startup.cs b/Apps/Website/Startup.cs
index 9c5fc09..568e1f7 100644
--- a/Apps/Website/Startup.cs
+++ b/Apps/Website/Startup.cs
@@ -2,8 +2,10 @@ using Application;
 using Domain;
 using Infrastructure;
 using Infrastructure.Filters;
+using Infrastructure.Identity;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Authorization;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
@@ -25,15 +27,33 @@ namespace Website
       // ServiceCollectionExtensions.AddHNServices(services); // strictement équivalent à la ligne du dessous
       // services.AddHNServicesInMemory();
       services.AddHNServicesEF();
+      services
+        .AddIdentity<User, Role>(options =>
+        {
+          // FIXME uniquement pour nos besoins :)
+          options.Password.RequiredLength = options.Password.RequiredUniqueChars = 0;
+          options.Password.RequireDigit = options.Password.RequireLowercase = options.Password.RequireUppercase = options.Password.RequireNonAlphanumeric = false;
+        })
+        .AddEntityFrameworkStores<HNDbContext>();
+
+      services.AddAuthorization(options =>
+      {
+        options.AddPolicy("IsAdmin", policy => policy
+          .RequireUserName("test"));
+      });
+
       services.AddControllersWithViews(options =>
       {
         options.Filters.Add<CustomExceptionFilter>();
+        options.Filters.Add(new AuthorizeFilter());
       });
     }
 
     // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
     public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
     {
+      app.UseHNDatabaseMigrations();
+
       //   app.Use(async (context, next) =>
       //   {
       //     try
@@ -69,6 +89,7 @@ namespace Website
       //     Console.WriteLine("<<< Ho");
       //   });
 
+      app.UseAuthentication();
       app.UseAuthorization();
 
       app.UseEndpoints(endpoints =>
diff --git a/Apps/Website/Views/Account/Login.cshtml b/Apps/Website/Views/Account/Login.cshtml
new file mode 100644
index 0000000..c18f609
--- /dev/null
+++ b/Apps/Website/Views/Account/Login.cshtml
@@ -0,0 +1,18 @@
+@model Infrastructure.Models.LoginViewModel
+@{
+  ViewData["Title"] = "Login";
+}
+
+<h1>Login</h1>
+
+<form method="post">
+  <label asp-for="@Model.Username"></label>
+  <input asp-for="@Model.Username">
+  <span asp-validation-for="@Model.Username"></span>
+
+  <label asp-for="@Model.Password"></label>
+  <input asp-for="@Model.Password">
+  <span asp-validation-for="@Model.Password"></span>
+
+  <button type="submit">Sign in</button>
+</form>
\ No newline at end of file
diff --git a/Apps/Website/Views/Account/Register.cshtml b/Apps/Website/Views/Account/Register.cshtml
new file mode 100644
index 0000000..e3b9e5a
--- /dev/null
+++ b/Apps/Website/Views/Account/Register.cshtml
@@ -0,0 +1,23 @@
+@model Infrastructure.Models.RegisterViewModel
+@{
+  ViewData["Title"] = "Register an account";
+}
+
+<h1>Register an account</h1>
+
+<form method="post">
+  <label asp-for="@Model.Username"></label>
+  <input asp-for="@Model.Username">
+  <span asp-validation-for="@Model.Username"></span>
+
+  <label asp-for="@Model.Password"></label>
+  <input asp-for="@Model.Password">
+  <span asp-validation-for="@Model.Password"></span>
+
+  <label asp-for="@Model.ConfirmPassword"></label>
+  <input asp-for="@Model.ConfirmPassword">
+  <span asp-validation-for="@Model.ConfirmPassword"></span>
+
+  <button type="submit">Create your account</button>
+</form>
+
diff --git a/Apps/Website/Views/Shared/_Layout.cshtml b/Apps/Website/Views/Shared/_Layout.cshtml
index b87ce1b..60d178f 100644
--- a/Apps/Website/Views/Shared/_Layout.cshtml
+++ b/Apps/Website/Views/Shared/_Layout.cshtml
@@ -24,6 +24,22 @@
                         <li class="nav-item">
                             <a class="nav-link text-dark" asp-area="" asp-controller="Links" asp-action="Create">Publish a new link!</a>
                         </li>
+                        @if (!User.Identity.IsAuthenticated)
+                        {
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-controller="Account" asp-action="Register">Create an account</a>
+                            </li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-controller="Account" asp-action="Login">Sign in</a>
+                            </li>
+                        }
+                        else
+                        {
+                            <li class="nav-item">@User.Identity.Name</li>
+                            <li class="nav-item">
+                                <a class="nav-link text-dark" asp-area="" asp-controller="Account" asp-action="Logout">Sign out</a>
+                            </li>
+                        }
                     </ul>
                 </div>
             </div>
diff --git a/Apps/Website/appsettings.Development.json b/Apps/Website/appsettings.Development.json
index 8983e0f..eaa8762 100644
--- a/Apps/Website/appsettings.Development.json
+++ b/Apps/Website/appsettings.Development.json
@@ -3,7 +3,8 @@
     "LogLevel": {
       "Default": "Information",
       "Microsoft": "Warning",
-      "Microsoft.Hosting.Lifetime": "Information"
+      "Microsoft.Hosting.Lifetime": "Information",
+      "Microsoft.EntityFrameworkCore": "Information"
     }
   }
 }
diff --git a/Apps/Website/appsettings.json b/Apps/Website/appsettings.json
index d9d9a9b..3eb4436 100644
--- a/Apps/Website/appsettings.json
+++ b/Apps/Website/appsettings.json
@@ -6,5 +6,8 @@
       "Microsoft.Hosting.Lifetime": "Information"
     }
   },
+  "ConnectionStrings": {
+    "Default": "Data Source=./hn.db"
+  },
   "AllowedHosts": "*"
 }
diff --git a/Apps/Website/hn.db b/Apps/Website/hn.db
new file mode 100644
index 0000000..8a35307
Binary files /dev/null and b/Apps/Website/hn.db differ
diff --git a/Apps/Website/hn.db-shm b/Apps/Website/hn.db-shm
new file mode 100644
index 0000000..65e88d0
Binary files /dev/null and b/Apps/Website/hn.db-shm differ
diff --git a/Apps/Website/hn.db-wal b/Apps/Website/hn.db-wal
new file mode 100644
index 0000000..8878a3a
Binary files /dev/null and b/Apps/Website/hn.db-wal differ
diff --git a/Domain/Comment.cs b/Domain/Comment.cs
index 518a113..2ade782 100644
--- a/Domain/Comment.cs
+++ b/Domain/Comment.cs
@@ -8,10 +8,12 @@ namespace Domain
     public Guid LinkId { get; }
     public string Content { get; }
     public DateTime CreatedAt { get; }
+    public Guid CreatedBy { get; }
 
-    internal Comment(Guid linkId, string content)
+    internal Comment(Guid linkId, Guid createdBy, string content)
     {
       Id = Guid.NewGuid();
+      CreatedBy = createdBy;
       LinkId = linkId;
       Content = content;
       CreatedAt = DateTime.UtcNow;
diff --git a/Domain/Link.cs b/Domain/Link.cs
index dd5cb04..d8c2a9f 100644
--- a/Domain/Link.cs
+++ b/Domain/Link.cs
@@ -10,12 +10,14 @@ namespace Domain
     public Guid Id { get; }
     public string Url { get; }
     public DateTime CreatedAt { get; }
+    public Guid CreatedBy { get; }
 
-    public Link(string url)
+    public Link(Guid createdBy, string url)
     {
       Id = Guid.NewGuid();
       CreatedAt = DateTime.UtcNow;
       Url = url;
+      CreatedBy = createdBy;
     }
 
     /// <summary>
@@ -24,9 +26,9 @@ namespace Domain
     /// </summary>
     /// <param name="content"></param>
     /// <returns></returns>
-    public Comment AddComment(string content)
+    public Comment AddComment(Guid createdBy, string content)
     {
-      return new Comment(this.Id, content);
+      return new Comment(this.Id, createdBy, content);
     }
   }
 }
diff --git a/Infrastructure/ApplicationBuilderExtensions.cs b/Infrastructure/ApplicationBuilderExtensions.cs
new file mode 100644
index 0000000..b9ec7ec
--- /dev/null
+++ b/Infrastructure/ApplicationBuilderExtensions.cs
@@ -0,0 +1,18 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Infrastructure
+{
+  public static class ApplicationBuilderExtensions
+  {
+    public static IApplicationBuilder UseHNDatabaseMigrations(this IApplicationBuilder builder)
+    {
+      using var scope = builder.ApplicationServices.CreateScope();
+      using var context = scope.ServiceProvider.GetRequiredService<HNDbContext>();
+      context.Database.Migrate();
+
+      return builder;
+    }
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/EntityTypes/CommentEntityType.cs b/Infrastructure/EntityTypes/CommentEntityType.cs
index d28cc24..fb18da7 100644
--- a/Infrastructure/EntityTypes/CommentEntityType.cs
+++ b/Infrastructure/EntityTypes/CommentEntityType.cs
@@ -1,4 +1,5 @@
 using Domain;
+using Infrastructure.Identity;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
 
@@ -16,6 +17,11 @@ namespace Infrastructure.EntityTypes
         .HasForeignKey(o => o.LinkId)
         .IsRequired()
         .OnDelete(DeleteBehavior.Cascade);
+      builder.HasOne<User>()
+        .WithMany()
+        .HasForeignKey(o => o.CreatedBy)
+        .IsRequired()
+        .OnDelete(DeleteBehavior.Cascade);
     }
   }
 }
\ No newline at end of file
diff --git a/Infrastructure/EntityTypes/LinkEntityType.cs b/Infrastructure/EntityTypes/LinkEntityType.cs
index 0798d76..82b20d5 100644
--- a/Infrastructure/EntityTypes/LinkEntityType.cs
+++ b/Infrastructure/EntityTypes/LinkEntityType.cs
@@ -1,4 +1,5 @@
 using Domain;
+using Infrastructure.Identity;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
 
@@ -11,6 +12,11 @@ namespace Infrastructure.EntityTypes
       builder.HasKey(o => o.Id);
       builder.Property(o => o.Url).HasMaxLength(250).IsRequired();
       builder.Property(o => o.CreatedAt).IsRequired();
+      builder.HasOne<User>()
+        .WithMany()
+        .HasForeignKey(o => o.CreatedBy)
+        .IsRequired()
+        .OnDelete(DeleteBehavior.Cascade);
     }
   }
 }
\ No newline at end of file
diff --git a/Infrastructure/HNDbContext.cs b/Infrastructure/HNDbContext.cs
index 6997ea6..1e80adb 100644
--- a/Infrastructure/HNDbContext.cs
+++ b/Infrastructure/HNDbContext.cs
@@ -1,12 +1,14 @@
+using System;
 using System.Linq;
 using Application;
 using Domain;
-using Infrastructure.EntityTypes;
+using Infrastructure.Identity;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
 
 namespace Infrastructure
 {
-  public class HNDbContext : DbContext, IData
+  public class HNDbContext : IdentityDbContext<User, Role, Guid>, IData
   {
     public DbSet<Link> Links { get; set; }
     public DbSet<Comment> Comments { get; set; }
diff --git a/Infrastructure/HttpCurrentUserProvider.cs b/Infrastructure/HttpCurrentUserProvider.cs
new file mode 100644
index 0000000..62e0e99
--- /dev/null
+++ b/Infrastructure/HttpCurrentUserProvider.cs
@@ -0,0 +1,26 @@
+using System;
+using Application;
+using Infrastructure.Identity;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Identity;
+
+namespace Infrastructure
+{
+  public class HttpCurrentUserProvider : ICurrentUserProvider
+  {
+    private readonly IHttpContextAccessor _httpContextAccessor;
+    private readonly UserManager<User> _userManager;
+
+    public HttpCurrentUserProvider(IHttpContextAccessor httpContextAccessor, UserManager<User> userManager)
+    {
+      _httpContextAccessor = httpContextAccessor;
+      _userManager = userManager;
+    }
+
+    public Guid GetCurrentUserId()
+    {
+      var userPrincipal = _httpContextAccessor.HttpContext.User;
+      return Guid.Parse(_userManager.GetUserId(userPrincipal));
+    }
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/Identity/Role.cs b/Infrastructure/Identity/Role.cs
new file mode 100644
index 0000000..3553019
--- /dev/null
+++ b/Infrastructure/Identity/Role.cs
@@ -0,0 +1,10 @@
+using System;
+using Microsoft.AspNetCore.Identity;
+
+namespace Infrastructure.Identity
+{
+  public class Role : IdentityRole<Guid>
+  {
+
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/Identity/User.cs b/Infrastructure/Identity/User.cs
new file mode 100644
index 0000000..d696a93
--- /dev/null
+++ b/Infrastructure/Identity/User.cs
@@ -0,0 +1,10 @@
+using System;
+using Microsoft.AspNetCore.Identity;
+
+namespace Infrastructure.Identity
+{
+  public class User : IdentityUser<Guid>
+  {
+    // On peut ajouter des propriétés ici au besoin
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/Infrastructure.csproj b/Infrastructure/Infrastructure.csproj
index 496090f..9e0f06e 100644
--- a/Infrastructure/Infrastructure.csproj
+++ b/Infrastructure/Infrastructure.csproj
@@ -9,6 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="5.0.5" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
diff --git a/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.Designer.cs b/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.Designer.cs
new file mode 100644
index 0000000..4e34500
--- /dev/null
+++ b/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.Designer.cs
@@ -0,0 +1,316 @@
+// <auto-generated />
+using System;
+using Infrastructure;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace Infrastructure.Migrations
+{
+    [DbContext(typeof(HNDbContext))]
+    [Migration("20210429074555_AddAspNetIdentity")]
+    partial class AddAspNetIdentity
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "5.0.5");
+
+            modelBuilder.Entity("Domain.Comment", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Content")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("LinkId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LinkId");
+
+                    b.ToTable("Comments");
+                });
+
+            modelBuilder.Entity("Domain.Link", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasMaxLength(250)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Links");
+                });
+
+            modelBuilder.Entity("Infrastructure.Identity.Role", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles");
+                });
+
+            modelBuilder.Entity("Infrastructure.Identity.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens");
+                });
+
+            modelBuilder.Entity("Domain.Comment", b =>
+                {
+                    b.HasOne("Domain.Link", null)
+                        .WithMany()
+                        .HasForeignKey("LinkId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.cs b/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.cs
new file mode 100644
index 0000000..f34f568
--- /dev/null
+++ b/Infrastructure/Migrations/20210429074555_AddAspNetIdentity.cs
@@ -0,0 +1,217 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Infrastructure.Migrations
+{
+    public partial class AddAspNetIdentity : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "AspNetRoles",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
+                    Name = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    NormalizedName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    ConcurrencyStamp = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetRoles", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetUsers",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
+                    UserName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    NormalizedUserName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    Email = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    NormalizedEmail = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
+                    EmailConfirmed = table.Column<bool>(type: "INTEGER", nullable: false),
+                    PasswordHash = table.Column<string>(type: "TEXT", nullable: true),
+                    SecurityStamp = table.Column<string>(type: "TEXT", nullable: true),
+                    ConcurrencyStamp = table.Column<string>(type: "TEXT", nullable: true),
+                    PhoneNumber = table.Column<string>(type: "TEXT", nullable: true),
+                    PhoneNumberConfirmed = table.Column<bool>(type: "INTEGER", nullable: false),
+                    TwoFactorEnabled = table.Column<bool>(type: "INTEGER", nullable: false),
+                    LockoutEnd = table.Column<DateTimeOffset>(type: "TEXT", nullable: true),
+                    LockoutEnabled = table.Column<bool>(type: "INTEGER", nullable: false),
+                    AccessFailedCount = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetUsers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetRoleClaims",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    RoleId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    ClaimType = table.Column<string>(type: "TEXT", nullable: true),
+                    ClaimValue = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetRoleClaims", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_AspNetRoleClaims_AspNetRoles_RoleId",
+                        column: x => x.RoleId,
+                        principalTable: "AspNetRoles",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetUserClaims",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    ClaimType = table.Column<string>(type: "TEXT", nullable: true),
+                    ClaimValue = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetUserClaims", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_AspNetUserClaims_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetUserLogins",
+                columns: table => new
+                {
+                    LoginProvider = table.Column<string>(type: "TEXT", nullable: false),
+                    ProviderKey = table.Column<string>(type: "TEXT", nullable: false),
+                    ProviderDisplayName = table.Column<string>(type: "TEXT", nullable: true),
+                    UserId = table.Column<Guid>(type: "TEXT", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetUserLogins", x => new { x.LoginProvider, x.ProviderKey });
+                    table.ForeignKey(
+                        name: "FK_AspNetUserLogins_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetUserRoles",
+                columns: table => new
+                {
+                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    RoleId = table.Column<Guid>(type: "TEXT", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetUserRoles", x => new { x.UserId, x.RoleId });
+                    table.ForeignKey(
+                        name: "FK_AspNetUserRoles_AspNetRoles_RoleId",
+                        column: x => x.RoleId,
+                        principalTable: "AspNetRoles",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_AspNetUserRoles_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "AspNetUserTokens",
+                columns: table => new
+                {
+                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    LoginProvider = table.Column<string>(type: "TEXT", nullable: false),
+                    Name = table.Column<string>(type: "TEXT", nullable: false),
+                    Value = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AspNetUserTokens", x => new { x.UserId, x.LoginProvider, x.Name });
+                    table.ForeignKey(
+                        name: "FK_AspNetUserTokens_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AspNetRoleClaims_RoleId",
+                table: "AspNetRoleClaims",
+                column: "RoleId");
+
+            migrationBuilder.CreateIndex(
+                name: "RoleNameIndex",
+                table: "AspNetRoles",
+                column: "NormalizedName",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AspNetUserClaims_UserId",
+                table: "AspNetUserClaims",
+                column: "UserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AspNetUserLogins_UserId",
+                table: "AspNetUserLogins",
+                column: "UserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AspNetUserRoles_RoleId",
+                table: "AspNetUserRoles",
+                column: "RoleId");
+
+            migrationBuilder.CreateIndex(
+                name: "EmailIndex",
+                table: "AspNetUsers",
+                column: "NormalizedEmail");
+
+            migrationBuilder.CreateIndex(
+                name: "UserNameIndex",
+                table: "AspNetUsers",
+                column: "NormalizedUserName",
+                unique: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "AspNetRoleClaims");
+
+            migrationBuilder.DropTable(
+                name: "AspNetUserClaims");
+
+            migrationBuilder.DropTable(
+                name: "AspNetUserLogins");
+
+            migrationBuilder.DropTable(
+                name: "AspNetUserRoles");
+
+            migrationBuilder.DropTable(
+                name: "AspNetUserTokens");
+
+            migrationBuilder.DropTable(
+                name: "AspNetRoles");
+
+            migrationBuilder.DropTable(
+                name: "AspNetUsers");
+        }
+    }
+}
diff --git a/Infrastructure/Migrations/20210429093017_AddCreatedBy.Designer.cs b/Infrastructure/Migrations/20210429093017_AddCreatedBy.Designer.cs
new file mode 100644
index 0000000..c0bd0fb
--- /dev/null
+++ b/Infrastructure/Migrations/20210429093017_AddCreatedBy.Designer.cs
@@ -0,0 +1,341 @@
+// <auto-generated />
+using System;
+using Infrastructure;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace Infrastructure.Migrations
+{
+    [DbContext(typeof(HNDbContext))]
+    [Migration("20210429093017_AddCreatedBy")]
+    partial class AddCreatedBy
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "5.0.5");
+
+            modelBuilder.Entity("Domain.Comment", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Content")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("CreatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("LinkId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreatedBy");
+
+                    b.HasIndex("LinkId");
+
+                    b.ToTable("Comments");
+                });
+
+            modelBuilder.Entity("Domain.Link", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("CreatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasMaxLength(250)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreatedBy");
+
+                    b.ToTable("Links");
+                });
+
+            modelBuilder.Entity("Infrastructure.Identity.Role", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles");
+                });
+
+            modelBuilder.Entity("Infrastructure.Identity.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens");
+                });
+
+            modelBuilder.Entity("Domain.Comment", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("CreatedBy")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Domain.Link", null)
+                        .WithMany()
+                        .HasForeignKey("LinkId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Domain.Link", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("CreatedBy")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Infrastructure/Migrations/20210429093017_AddCreatedBy.cs b/Infrastructure/Migrations/20210429093017_AddCreatedBy.cs
new file mode 100644
index 0000000..a011471
--- /dev/null
+++ b/Infrastructure/Migrations/20210429093017_AddCreatedBy.cs
@@ -0,0 +1,81 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Infrastructure.Migrations
+{
+  public partial class AddCreatedBy : Migration
+  {
+    protected override void Up(MigrationBuilder migrationBuilder)
+    {
+      migrationBuilder.Sql("DELETE FROM Comments;");
+      migrationBuilder.Sql("DELETE FROM Links;");
+
+      migrationBuilder.AddColumn<Guid>(
+          name: "CreatedBy",
+          table: "Links",
+          type: "TEXT",
+          nullable: false,
+          defaultValue: new Guid("00000000-0000-0000-0000-000000000000"));
+
+      migrationBuilder.AddColumn<Guid>(
+          name: "CreatedBy",
+          table: "Comments",
+          type: "TEXT",
+          nullable: false,
+          defaultValue: new Guid("00000000-0000-0000-0000-000000000000"));
+
+      migrationBuilder.CreateIndex(
+          name: "IX_Links_CreatedBy",
+          table: "Links",
+          column: "CreatedBy");
+
+      migrationBuilder.CreateIndex(
+          name: "IX_Comments_CreatedBy",
+          table: "Comments",
+          column: "CreatedBy");
+
+      migrationBuilder.AddForeignKey(
+          name: "FK_Comments_AspNetUsers_CreatedBy",
+          table: "Comments",
+          column: "CreatedBy",
+          principalTable: "AspNetUsers",
+          principalColumn: "Id",
+          onDelete: ReferentialAction.Cascade);
+
+      migrationBuilder.AddForeignKey(
+          name: "FK_Links_AspNetUsers_CreatedBy",
+          table: "Links",
+          column: "CreatedBy",
+          principalTable: "AspNetUsers",
+          principalColumn: "Id",
+          onDelete: ReferentialAction.Cascade);
+    }
+
+    protected override void Down(MigrationBuilder migrationBuilder)
+    {
+      migrationBuilder.DropForeignKey(
+          name: "FK_Comments_AspNetUsers_CreatedBy",
+          table: "Comments");
+
+      migrationBuilder.DropForeignKey(
+          name: "FK_Links_AspNetUsers_CreatedBy",
+          table: "Links");
+
+      migrationBuilder.DropIndex(
+          name: "IX_Links_CreatedBy",
+          table: "Links");
+
+      migrationBuilder.DropIndex(
+          name: "IX_Comments_CreatedBy",
+          table: "Comments");
+
+      migrationBuilder.DropColumn(
+          name: "CreatedBy",
+          table: "Links");
+
+      migrationBuilder.DropColumn(
+          name: "CreatedBy",
+          table: "Comments");
+    }
+  }
+}
diff --git a/Infrastructure/Migrations/HNDbContextModelSnapshot.cs b/Infrastructure/Migrations/HNDbContextModelSnapshot.cs
index baf7ca5..0cfe611 100644
--- a/Infrastructure/Migrations/HNDbContextModelSnapshot.cs
+++ b/Infrastructure/Migrations/HNDbContextModelSnapshot.cs
@@ -29,11 +29,16 @@ namespace Infrastructure.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("TEXT");
 
+                    b.Property<Guid>("CreatedBy")
+                        .HasColumnType("TEXT");
+
                     b.Property<Guid>("LinkId")
                         .HasColumnType("TEXT");
 
                     b.HasKey("Id");
 
+                    b.HasIndex("CreatedBy");
+
                     b.HasIndex("LinkId");
 
                     b.ToTable("Comments");
@@ -48,6 +53,9 @@ namespace Infrastructure.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("TEXT");
 
+                    b.Property<Guid>("CreatedBy")
+                        .HasColumnType("TEXT");
+
                     b.Property<string>("Url")
                         .IsRequired()
                         .HasMaxLength(250)
@@ -55,17 +63,276 @@ namespace Infrastructure.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("CreatedBy");
+
                     b.ToTable("Links");
                 });
 
+            modelBuilder.Entity("Infrastructure.Identity.Role", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles");
+                });
+
+            modelBuilder.Entity("Infrastructure.Identity.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens");
+                });
+
             modelBuilder.Entity("Domain.Comment", b =>
                 {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("CreatedBy")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
                     b.HasOne("Domain.Link", null)
                         .WithMany()
                         .HasForeignKey("LinkId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
                 });
+
+            modelBuilder.Entity("Domain.Link", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("CreatedBy")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.Role", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.HasOne("Infrastructure.Identity.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
 #pragma warning restore 612, 618
         }
     }
diff --git a/Infrastructure/Models/LoginViewModel.cs b/Infrastructure/Models/LoginViewModel.cs
new file mode 100644
index 0000000..effa663
--- /dev/null
+++ b/Infrastructure/Models/LoginViewModel.cs
@@ -0,0 +1,14 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Infrastructure.Models
+{
+  public class LoginViewModel
+  {
+    [Required]
+    public string Username { get; set; }
+
+    [Required]
+    [DataType(DataType.Password)]
+    public string Password { get; set; }
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/Models/RegisterViewModel.cs b/Infrastructure/Models/RegisterViewModel.cs
new file mode 100644
index 0000000..ee506cd
--- /dev/null
+++ b/Infrastructure/Models/RegisterViewModel.cs
@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Infrastructure.Models
+{
+  public class RegisterViewModel
+  {
+    [Required]
+    public string Username { get; set; }
+
+    [Required]
+    [DataType(DataType.Password)]
+    public string Password { get; set; }
+
+    [Required]
+    [Compare(nameof(Password))]
+    [DataType(DataType.Password)]
+    public string ConfirmPassword { get; set; }
+  }
+}
\ No newline at end of file
diff --git a/Infrastructure/ServiceCollectionExtensions.cs b/Infrastructure/ServiceCollectionExtensions.cs
index 50d548d..fdb9a0d 100644
--- a/Infrastructure/ServiceCollectionExtensions.cs
+++ b/Infrastructure/ServiceCollectionExtensions.cs
@@ -1,3 +1,4 @@
+using System;
 using Application;
 using Domain;
 using Microsoft.EntityFrameworkCore;
@@ -20,6 +21,8 @@ namespace Infrastructure
       {
         var configuration = provider.GetRequiredService<IConfiguration>();
 
+        // configuration["ConnectionStrings:Default"]
+
         options.UseSqlite(configuration.GetConnectionString("Default"));
       });
 
@@ -38,9 +41,10 @@ namespace Infrastructure
     /// <returns></returns>
     public static IServiceCollection AddHNServicesInMemory(this IServiceCollection services)
     {
-      var link1 = new Domain.Link("http://default.website");
-      var link2 = new Domain.Link("http://another.website");
-      var link3 = new Domain.Link("http://a.final.website");
+      var uid = Guid.NewGuid();
+      var link1 = new Domain.Link(uid, "http://default.website");
+      var link2 = new Domain.Link(uid, "http://another.website");
+      var link3 = new Domain.Link(uid, "http://a.final.website");
 
       services.AddSingleton<ILinkRepository>(new Infrastructure.Repositories.Memory.LinkRepository(
         link1,
@@ -48,8 +52,8 @@ namespace Infrastructure
         link3
       ));
       services.AddSingleton<ICommentRepository>(new Infrastructure.Repositories.Memory.CommentRepository(
-        link1.AddComment("my first comment"),
-        link3.AddComment("another comment")
+        link1.AddComment(uid, "my first comment"),
+        link3.AddComment(uid, "another comment")
       ));
       services.AddSingleton<IData>(serviceProvider =>
       {
@@ -69,6 +73,7 @@ namespace Infrastructure
     /// <returns></returns>
     private static IServiceCollection AddCommon(this IServiceCollection services)
     {
+      services.AddScoped<ICurrentUserProvider, HttpCurrentUserProvider>();
       services.AddTransient<LinkService>();
       services.AddTransient<CommentService>();