i'm not sure what i'm doing

SurveyBackend/SurveyBackend.API/Program.cs

@@ -1,3 +1,8 @@
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using SurveyBackend.Core.Models;
+using SurveyBackend.Infrastructure.Data;
+
 namespace SurveyBackend;
 
 public class Program
@@ -9,6 +14,15 @@ public class Program
         // Add services to the container.
         builder.Services.AddAuthorization();
 
+        builder.Services.AddDbContext<DataContext>(options =>
+        {
+            options.UseSqlite(builder.Configuration.GetConnectionString("DefaultConnection"));
+        });
+
+        builder.Services.AddIdentity<User, IdentityRole<int>>(options => { })
+            .AddEntityFrameworkStores<DataContext>()
+            .AddDefaultTokenProviders();
+
         builder.Services.AddControllers();
 
         // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle

SurveyBackend/SurveyBackend.API/SurveyBackend.API.csproj

@@ -9,7 +9,13 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.2"/>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.3" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0"/>
     </ItemGroup>
 
+    <ItemGroup>
+      <ProjectReference Include="..\SurveyBackend.Core\SurveyBackend.Core.csproj" />
+      <ProjectReference Include="..\SurveyBackend.Infrastructure\SurveyBackend.Infrastructure.csproj" />
+    </ItemGroup>
+
 </Project>

SurveyBackend/SurveyBackend.API/appsettings.Development.json

@@ -4,5 +4,8 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning"
     }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": "Data Source=Application.db"
   }
 }

SurveyBackend/SurveyBackend.API/appsettings.json

@@ -5,5 +5,8 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
-  "AllowedHosts": "*"
+  "AllowedHosts": "*",
+  "ConnectionStrings": {
+    "DefaultConnection": "Data Source=Application.db"
+  }
 }

SurveyBackend/SurveyBackend.Core/Models/User.cs

@@ -1,15 +1,11 @@
+using Microsoft.AspNetCore.Identity;
+
 namespace SurveyBackend.Core.Models;
 
-public class User
+public class User : IdentityUser<int>
 {
-    public int Id { get; set; }
     public string FirstName { get; set; }
     public string LastName { get; set; }
-    public string Username { get; set; }
-    public string Email { get; set; }
-
-    public byte[] PasswordSalt { get; set; }
-    public byte[] PasswordHash { get; set; }
 
     public ICollection<Group> Groups { get; set; }
 }

SurveyBackend/SurveyBackend.Core/SurveyBackend.Core.csproj

@@ -6,4 +6,9 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
+    <ItemGroup>
+      <PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.3.1" />
+      <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="8.0.14" />
+    </ItemGroup>
+
 </Project>

SurveyBackend/SurveyBackend.Infrastructure/Data/DataContext.cs

@@ -1,11 +1,12 @@
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
 using SurveyBackend.Core.Models;
 
 namespace SurveyBackend.Infrastructure.Data;
 
-public class DataContext : DbContext
+public class DataContext : IdentityDbContext<User, IdentityRole<int>, int>
 {
-    public DbSet<User> Users { get; set; }
     public DbSet<Group> Groups { get; set; }
 
     public DataContext(DbContextOptions<DataContext> options) : base(options)