OpenID Connect 1.0 Relying Party Role Support (OpenID Connect 1.0 Client)

Feature Request

I would like to see Authelia support fuctioning as an OIDC client to use an external source of users for zero click authentication.

Description

Currently it is not possible to do a truly single sign on experience because users will still see an Authelia sign in page. I'd like my users to see the primary SSO panel they're used to seeing and then have them transparently auth to Authelia on their way through the proxy with OIDC like I do currently with Pomerium.

Use Case

This feature enables the truly "magic" feeling that happens with BeyondCorp architectures where the system just "knows" who you are without you seeing login screens or having to perform extra steps. It reduces lower friction and can make adoption easier by making the change completely transparent. Right now this is the only feature that is missing for me to fully adopt Authelia across my organization.