fix double name registration

ReallifeGamemode.Server/Events/Register.cs

@@ -17,7 +17,7 @@ namespace ReallifeGamemode.Server.Events
         {
             using (var dbContext = new DatabaseContext())
             {
-                if (!dbContext.Users.Any(u => u.Name == username))
+                if (!dbContext.Users.Any(u => u.Name.ToLower() == username.ToLower().Trim()))
                 {
                     var user = new Entities.User
                     {