public function saveUser($user) {
        if ($user['id'] != null) { //update
            $entity = $this->getUser($user['id']);

            //do something

            if (!$entity)
                throw new Exception('Error saving user!');
        } else { //insert
            $modelCountries = array();
            $entity = new User();
            $entity->email = $user['email'];
            $entity->responsable = $user['responsable'];
            $entity->password = $this->createPass($user['password']);
            $entity->url = $user['url'];
            $entity->role = $user['role'];
            foreach ($user['countries'] as $country) {
                $p = new Countries();
                $p->countryName = $country;
                $p->user = $entity;
                $modelCountries[] = $p;
            }
            $entity->countries = $modelCountries;
        }

        $this->em->persist($entity);
        $this->em->flush(); //save the user
    }