[Konstantinos]

pawn Код:

public OnPlayerRequestClass( playerid, classid )
{
    if( /* CHECK IF THEY DID NOT REGISTER/LOGIN */ )
    {
        SendClientMessage (playerid, 0xFF0000FF, "You need to register/login first." );
        return 0; // Returning 0 will prevent the player from spawning
    }
    return 1;
}