  OAuth2Test() : request_(&cm_.thread_local_cluster_.async_client_) {
    factory_context_.cluster_manager_.initializeClusters({"auth.example.com"}, {});
    init();
  }
  OAuth2Test() : request_(&cm_.thread_local_cluster_.async_client_) {
    factory_context_.cluster_manager_.initializeClusters({"auth.example.com"}, {});
    init();
  }