/**
  * load roles to item
  *
  * @param User $item
  */
 private function loadAuthDrivers(&$item)
 {
     // clear roles
     $item->deleteAllAuthDrivers();
     // set roles to item
     foreach ($this->getAuthDrivers($item->id) as $authDriver => $authId) {
         $item->addAuthDriver($authDriver, $authId);
     }
 }