public function unsubscribe(User $user, Subscription $subscription)
{
$query = $this->getEntityManager()->createNativeQuery('DELETE FROM xdb__user_subscription_relation WHERE subscription_id=? AND user_id=?', new ResultSetMapping());
$query->setParameter(1, $subscription->getId());
$query->setParameter(2, $user->getId());
try {
$query->getResult();
} catch (\PDOException $e) {
// this is thrown, but nothing went wrong (seems like)
}
}
