How do I backup fingerprints?

Is it possible to save my fingerprints so I could use it on another rom? I'm on cm13

How to save fingerprints and restore them after full wipe?

Ok, so this is the issue:
I flash ROMs all the time.
I want to connect my phone to my work email, which forces me to use a PIN to unlock. I can also use a fingerprint instead to unlock.
Since my girlfriend uses my phone from time to time, I don't want to make her add her fingerprints everytime I do a full wipe.
(why full wipe? to test other ROMs for example)

Is there a way to keep the fingerprints backed up somewhere?
thanks.

More than 5 fingerprints possible? (mod)

Hey guys i want to know if there is any mod or workaround so that i can use more than 5 fingerprints on my OP3.

Thank u 4 help guys:)

is possible lock apps with fingerprints?

good morning. with my lg g5 is only possible to lock gallery and start phone and few other... but is not possible to add locked apps like facebook, whatsapp and others i want. can anyone confirm that are necessary third part apps for do this or how can i do? thanks