pdm = new PersistentDataManager(); } public function getById(int $id): ?OAuthClient { return $this->pdm->selectFromDbById($id, OAuthClient::class); } public function getByClientId(string $clientId): ?OAuthClient { $select = new Select(\Container::$dbConnection); $select->where('client_id', '=', $clientId); return $this->pdm->selectFromDb($select, OAuthClient::class); } }