Doctrine\Common\Persistence\ObjectRepository::findBy PHP Method

    public function findBy(array $criteria, array $orderBy = null, $limit = null, $offset = null);

 public function findAll()
 {
     if (false === $this->authorizationService->isGranted('user.admin')) {
         throw new UnauthorizedException('Insufficient Permissions');
     }
     return $this->objectRepository->findBy([], ['email' => 'ASC']);
 }