Changing for make everything work again

SeniorAssistant/Models/User.cs

@@ -1,18 +1,19 @@
 using LinqToDB.Mapping;
 using Microsoft.AspNetCore.Identity;
+using Newtonsoft.Json;
 
 namespace SeniorAssistant.Models
 {
     public class User : IHasUsername
     {
-        [PrimaryKey]
-        [NotNull]
+        [Column(IsPrimaryKey = true, CanBeNull = false)]
         public string Username { get; set; }
 
         [NotNull]
         public string Email { get; set; }
 
         [NotNull]
+        [JsonIgnore]
         public string Password { get; set; }
 
         [NotNull]