I am implementing in app purchases for Android. And in documentation they write:
So the question really is: do I really need to call initiateGetUserIdRequest() wright after registerObserver ??? Is it critically?? Thanks.
No, you only must call it if you need the userId.
They still are working on the documentation. Even that, I think you have an older version of it, if you go to the developer portal I think you'll find a new version that it's still not definitive.