Auth::removeUser() -- remove a user account
Description
     Remove a user from the Auth Container.
    
Parameter
     
- string
        $username
         
         the username of the user to remove
        
 
    Return value
     mixed - 
     TRUE on success, a PEAR Error on failure.
    
Note
This function can not be called
statically.
     Not all Auth Containers implement this functionality.