Simplified bank money transfer

Server/Entities/User.cs

@@ -16,7 +16,7 @@ using System.Text;
 
 namespace reallife_gamemode.Server.Entities
 {
-    public class User
+    public class User : IBankAccountOwner
     {
         [Key]
         [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
@@ -28,8 +28,8 @@ namespace reallife_gamemode.Server.Entities
         [StringLength(64)]
         public string Password { get; set; }
         public int LogUserId { get; set; }
-        [Timestamp]
-        public byte[] RegistrationDate { get; set; }
+        [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
+        public DateTime RegistrationDate { get; set; }
 
         [EmailAddress]
         [StringLength(64)]
@@ -131,5 +131,20 @@ namespace reallife_gamemode.Server.Entities
         }
 
         public bool IsAdmin(AdminLevel level) => AdminLevel >= level;
+
+        public IBankAccount GetBankAccount(DatabaseContext databaseContext = null)
+        {
+            if (databaseContext == null)
+            {
+                using (databaseContext = new DatabaseContext())
+                {
+                    return databaseContext.UserBankAccounts.FirstOrDefault(u => u.UserId == this.Id);
+                }
+            }
+            else
+            {
+                return databaseContext.UserBankAccounts.FirstOrDefault(u => u.UserId == this.Id);
+            }
+        }
     }
 }