if empty this- settings username if this- checkUsername username this-

	if (!empty($this->settings['username'])) {
				if (!$this->checkUsername($username, $this->settings['username'])) {
					$this->wrong_password = true; //TODO: need to remove. don't use					
					$this->setError('username_access', 'You have no access to login this site'); 
					return;
				}
			}