private function setClient()
 {
     $client = new GoogleClient();
     $client->setApplicationName($this->app_name);
     $client->setClientId($this->client_id);
     $client->setClientSecret($this->client_secret);
     $client->setRedirectUri($this->redirect_uri);
     $client->setDeveloperKey($this->developer_key);
     $client->setUseObjects(true);
     $client->setScopes(array('https://www.googleapis.com/auth/analytics.readonly', 'https://www.googleapis.com/auth/userinfo.email', 'https://www.googleapis.com/auth/userinfo.profile'));
     $this->oauth = new Oauth2Service($client);
     $this->client = $client;
 }