public function __construct(?string $app_id = null, ?string $rest_api_key = null, ?string $user_auth_key = null) 	{ 		$config = new Config($app_id ?? setting('onesignal_app_id'), $rest_api_key ?? setting('onesignal_rest_api_key'), $user_auth_key ?? setting('onesignal_user_auth_key')); 		$requestFactory = $streamFactory = new Psr17Factory;  		$this->api = new OneSignal($config, new Client, $requestFactory, $streamFactory); 	}