/**
  * Add groups to a user
  *
  * @author ZZK
  * @link   http://verecom.com
  *
  * @param array                                 $groups
  * @param \Cartalyst\Sentry\Users\UserInterface $user
  */
 protected function syncGroups(array $groups, UserInterface $user)
 {
     $user->groups()->detach();
     $user->groups()->sync($groups);
 }