OmniAuth strategy to use different password strategies

 Provides an OmniAuth strategy that can be used to authenticate using different
 password strategies. The compatible strategies include omniauth-internal,
 which can authenticate using has_secure_password in Rails and
 omniauth-kerberos, which can authenticate using a Kerberos server.
 .
 OmniAuth is a library that standardizes multi-provider authentication for web
 applications