/**
* @param IUser|string $userOrCardId
*/
public function deleteUser($userOrCardId)
{
$systemAddressBook = $this->getLocalSystemAddressBook();
if ($userOrCardId instanceof IUser) {
$name = $userOrCardId->getBackendClassName();
$userId = $userOrCardId->getUID();
$userOrCardId = "{$name}:{$userId}.vcf";
}
$this->backend->deleteCard($systemAddressBook['id'], $userOrCardId);
}
