Newscoop\Services\GarbageCollectionService::gcTokens PHP 메소드

    private function gcTokens()
    {
        $query = $this->em->createQueryBuilder()->delete('Newscoop\\Entity\\UserToken', 't')->where('t.user NOT IN (SELECT u.id FROM Newscoop\\Entity\\User u)')->getQuery();
        $query->execute();
    }