i keep entering the username and pass but it still says i did not register

i used my username and pass from which i used to enter the forum but it still doesn't work.. when i enter the game and typed in my username and pass it just keeps saying that I'm not a registered user

 

Forum account and game account are not the same.

You register for a game account here:
https://royals.ms/?page=register

When making an account, use a different login and password from your forum account for extra security.