public function findBetweenDates($d1, $d2){
        $qb = $this->em->createQueryBuilder();
        $qb
        ->select('e')
        ->from($this->repository,'e')
        ->add('where', $qb->expr()->between(
                 'e.date_created',
                 ':d1',
                 ':d2'
             )
        )
        ->getResult();
    }