accountmanager - Android account manager getPassword returns Null -

i investigating ways in android account manager may return empty password account. have tried following things:

1. launch app creates xyz account. explicitly go in settings->xyz , delete account.

   • in app have checks make sure whenever account null, create new 1 , call getpassword. not able repro empty password scenario

2. use app in "owner mode" , in restricted mode give access app. happen? restricted user able use xyz account or getpassword return null?