on the other hand, its SQL backend modules insist on fetching a password and comparing them using their own functionality and there's no way to get to the the u

on the other hand, its SQL backend modules insist on fetching a password and comparing them using their own functionality and there's no way to get to the the user's typed password into a custom query. That means that there's no way to authenticate users if you use a password encryption scheme not supported by the bundled modules (like bcrypt for example)