in unreal/OfflineMainMenuWidget.cpp [58:67]
void UOfflineMainMenuWidget::StartSessionRequest(FString idt) {
TSharedRef<IHttpRequest, ESPMode::ThreadSafe> StartSessionHttpRequest = Http->CreateRequest();
StartSessionHttpRequest->SetVerb("GET");
StartSessionHttpRequest->SetURL(ApiGatewayEndpoint + StartSessionURI);
StartSessionHttpRequest->SetHeader("Content-Type", "application/json");
StartSessionHttpRequest->SetHeader("Authorization", idt);
StartSessionHttpRequest->OnProcessRequestComplete().BindUObject(this, &UOfflineMainMenuWidget::OnStartSessionResponse);
StartSessionHttpRequest->ProcessRequest();
}