protected function defaultCurlOptions() { $curl_options = parent::defaultCurlOptions(); $curl_options[CURLOPT_USERAGENT] = (empty($this->clientName) ? empty(Yii::$app->name) ? Yii::$app->id : Yii::$app->name : $this->clientName) . ' OAuth 2.0 Client'; return $curl_options; }