Re:Google warns that ADB backup, restore may be removed in a...
by kelnos on Monday May 20, 2019 @04:35AM
(#19958466)
In this case, Authenticator+'s cloud sync is just an encrypted sqlite DB (with dirt-simple schema) that gets uploaded to Google Drive (I believe there are also other options for upload target). So it's pretty trivial to migrate to other services.
Do use an encrypted cloud sync but make sure that it doesn't create a similar problem.