Logged out of my account

The app logged me out without me if pressing any buttons for it to do so i just went on to walk to hatch an egg and it was logged out even though a few hours before then it was working just fine now i cant even sign up for a new account or try to retrieve my username for my old one because it keeps saying access denied

Kejdjejeneuucurbeydte about Pokémon GO, v1.39.1