i'm not sure what i'm doing

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; }
 }