c++ - 使用 Google People API 时出现错误 203

Question

Google People API 允许读取和管理联系人。我尝试执行允许我获取的代码，但是，我收到错误 203。这是我的代码

QUrl url("https://people.googleapis.com/v1/{resourceName=people/me}/connections");
url.addQueryItem("pageToken", nextPageToken);

QNetworkRequest* request = new QNetworkRequest( url );
request->setHeader( QNetworkRequest::ContentTypeHeader, "application/json" );
request->setRawHeader( "Authorization", QString( "Bearer %1" ).arg( this->_oAuth2->token() ).toLatin1() );

return this->m_networkManager->get(*request);

但是，我收到错误 203。我做错了什么？