Created simple login page, and User model

DataAccessLayer/Database/Models/User.cs

@@ -0,0 +1,8 @@
+namespace DAL.Database.Models;
+
+public class User
+{
+    public required string Username { get; init; }
+    public required string Password { get; init; } // TODO use hashing and salt
+    public string? Colour { get; init; }
+}