"This user already exists." on OIDC Login

[mhutter]

Hi! I have a Miniflux installed, and configured to use OIDC authentication via rauthy. Everything worked well I could authenticate using rauthy.

However today I signed out and tried to sign in again, and now I just get the message "This user already exists." when I'm redirected to Miniflux.

Any Idea how to investigate this issue?

[maxmelab]

Stumbled on this discussion while I was having the same issue.
I was able to link my OIDC provider with my personal user (not the admin user) after it was created with email/password.

Go to: Settings --> Authentication Settings. There will be a button "Link my OpenID Connect account".
It will open your identity provider and ask you to login to complete the association.

Hope this helps future people looking for the same thing.