When I was working in Android Studio, Xamarin, etc I was able to Auth a user and then save their info (persist login) by storing the required info in the android account manager.
I saw other threads here that you can merely use files on I think it was Files.DirInternal or something like that (sorry on my phone replying) to write/retrieve this kind of data which is isolated from other apps and interactions, but is that really secure?
Thanks! After one day with B4A, I'll never use another android IDE. B4A is awesome!!!