I believe there is an issue with logging out of an app account and logging back in as another user. When you select change account it only brings up the google login prompt and when you attempt to type in the new account login the app attempts to log into the previous user account. This was experienced on an iphone.
Hi Mike, are you able to take few printscreens from that situation, thanks.
Also sent you an email with video screen shot.
What happens if you select Any provider in that app?
Thats the issue you can not select any other provider with that app. I tried in another app using dropbox and the dropbox login comes up but if you select google it defaults to the original user and does not prompt for a new user login so you effectively can not change the user.
I mean if you select Security > Provider > Any provider
Still an issue
Please contact firstname.lastname@example.org directly for help.