Hi River, if you’re unsure about OpenID Connect, I’d suggest watching the Memberstack OpenID Connect video and going through the tutorial: https://docs.memberstack.com/hc/en-us/articles/8161104982043-Custom-SSO-Integrations. That’s what I did.
For configuring OpenID Connect on the Discourse end, you can find the relevant information here: Discourse OpenID Connect. A detail that’s specific to Memberstack that isn’t mentioned in that topic is that I think the Discourse openid_connect_authorize_scope site setting needs to be set to:
openid email profile
(Assuming that’s correct, it should get added to the “Provider specific notes” section at the bottom of the Discourse OpenID Connect topic.)
This is a cause of endless confusion on here, but DiscourseConnect refers to a completely separate authentication protocol. The information you need is in the Discourse OpenID connect topic that I linked to.