GoogleAuthProvider: fix extracting of user info
GoogleAuthProvider: fix extracting of user info

Fixes: 20f92cbbf9eb ("GoogleAuthProvider: avoid JSONObjectSerializer")
Signed-off-by: Jan Viktorin <3eab6ac54c005c4408f608556a6663b7f2abede7@fit.vutbr.cz>

BeeeOn/server,BeeeOn/server,BeeeOn/server,BeeeOn/server