Was at a pokestop. Spun the ring to get pokeballs. Got a pop up window that said network connection, then the game forced me out. Tried to reopen game, and all I got was failed to authenticate. Was looking it up online, and apparently it is a know bug with the current game version. If you sign up with the Google/Gmail option, you have a chance of having this happen and permanently loosing your account. Very dissatisfied with this game. Very glad I didnt donate money.
Bulls-eye-bob ? about Pokémon GO, v1.37.2