public function loadUserByUsername($username)
{
    // 本会員ステータスの会員のみ有効.
    $CustomerStatus = $this
        ->getEntityManager()
        ->getRepository('Eccube\Entity\Master\CustomerStatus')
        ->find(CustomerStatus::ACTIVE);

    $query = $this->createQueryBuilder('c')
        ->where('c.email = :email')
        ->andWhere('c.del_flg = :delFlg')
        ->andWhere('c.Status =:CustomerStatus')
        ->setParameters(array(
            'email' => $username,
            'delFlg' => Constant::DISABLED,
            'CustomerStatus' => $CustomerStatus,
        ))
        ->setMaxResults(1)
        ->getQuery();
    $Customer = $query->getOneOrNullResult();
    if (!$Customer) {
        throw new UsernameNotFoundException(sprintf('Username "%s" does not exist.', $username));
    }

    return $Customer;
}