Duo Security as OAuth/SSO authentication integration

[heiniha]

Would be great to see the authentication integration include Duo Security as an option, would this be possible?
See more here about Duo OAuth2: https://duo.com/docs/sso-oauth-client-credentials

Or maybe even their OpenID or Saml 2.0 solution might be of interest, see more on these two in the following links.
OpenID: https://duo.com/docs/sso-oidc-generic
Saml 2.0: https://duo.com/docs/sso-generic

Or in worst case a more general OAuth configuration setup, that isn't hard-coded in the backend, which would open up the possibility to support many variants on the market.