Module: pwquality
requisite			pam_pwquality.so retry=3
Module: snappy-extrausers
[success=end default=ignore]      pam_extrausers.so minlen=4 sha512 use_authtok try_first_pass
Module: unix
[success=end default=ignore]	pam_unix.so obscure use_authtok try_first_pass sha512