Hey Cindy!
First of all, thank you so much for this extension for mediawiki!
I have set it up with Keycloak and it works just fine, but many of my users seem to have a hard time pressing that extra button to use the OIDC login. So I set the $wgPluggableAuth_EnableLocalLogin option in PluggableAuth. Now, users are directly redirected to the keycloak login page.
The problem is that when users log out, they are logged out in the wiki but not from keycloak. I worry that users log out thinking no one can access their data, but just by pressing log in, they are logged into the wiki again.
As we also have other services to which one can login to, I'd like the log off button to really log the user out.
I could achieve this in nextcloud by setting a logout url, however I found no configuration to do the same in OpenID Connect / PluggableAuth.
Thanks in advance!