I have set up push notification in PlayFab successfully however I can't figure out how to register for (Android) notifications in unreal engine. I am a bit surprised that there is very little documentation on UE4 but there are plenty on Unity. I am confident there is no issue with notification setup on PlayFab side. By referring to Unity example I figured out, first you need to log in with Android device and then call the Android Device Push Notification Registration Node. It would be nice to know what paremeters are optional and what are required. Also what is Device Token?