Should UserNode be swappable?

[Piet van Leeuwen]

Just like User model can be replaced and customised, can we do the same for UserNode? e.g. user = get_user_node().
This would be really useful for overriding the querysets / fields etc. But relay.py and mutations.py have a direct ref to UserNode, so if I override this, I then need to override those too?