/**
  * Function to delete the current user authentication token from the DB and user cookies
  */
 public static function deleteAuthenticationToken()
 {
     if (RequestMethods::cookie('AUTHID') != '') {
         Authtoken::deleteAll(array('token = ?' => RequestMethods::cookie('AUTHID')));
         \setcookie('AUTHID', '', time() - 1800);
     }
 }