- Made oidc config more generic to not be overly reliant on the library
based upon learnings from saml2 auth.
- Removed any settings that are redundant or not deemed required for
initial implementation.
- Reduced some methods down where not needed.
- Renamed OpenID to OIDC
- Updated .env.example.complete to align with all options and their
defaults
Related to #2169
Dan Brown
Jasper Weyne