After i let someone have my name and password to log in and help with my site. Now when i go back to try and change my password back to what it was and i get "Sorry, this user is protected from being altered in the config.php file by the $config['SpecialUsers']['undeletableusers'] variable." and cannot switch. Also i noticed that all my registered users are moved to a group "new users" which i have never saw. Any info?