Registering doesn't automatically give that player an ini, player inis and game inis are created when you write something to them THEN they are created. E.g. I register an account and there is no player ini associated with that account yet, then when you use gms_ini_player_write("section", "key", "blah blah blah"), you will have created an ini for the player currently logged in and it will be visible when the server has finished processing the information but it will still be active and able to use even before it's visible on the site.