Hook on password change
We should have a hook on password change so that new password could be forwarded to another system before/after change in LL::NG. It could be a new entry point for custom plugins or a new hook. It should work for any password change use cases: password change from menu, reset by mail, reset forced by password policy.
See for example was has been done in Self Service Password: https://self-service-password.readthedocs.io/en/latest/config_preposthook.html