Error authenticating with Authelia

[cellulosa]

heya thank you for the great plugin 🚀

When I try to login with a LDAP user, I get the following error in the Jellyfin logs:

[ERR] [87] Jellyfin.Server.Implementations.Users.UserManager: Error authenticating with provider "Default"
MediaBrowser.Controller.Authentication.AuthenticationException: Specified user does not exist.
   at Jellyfin.Server.Implementations.Users.DefaultAuthenticationProvider.Authenticate(String username, String password, User resolvedUser)
   at Jellyfin.Server.Implementations.Users.UserManager.AuthenticateWithProvider(IAuthenticationProvider provider, String username, String password, User resolvedUser)
[INF] [87] Jellyfin.Server.Implementations.Users.UserManager: Authentication request for "testuser" has been denied (IP: "...").
[ERR] [87] Jellyfin.Server.Middleware.ExceptionMiddleware: Error processing request: "Invalid username or password entered". URL "POST" "/Users/authenticatebyname".

I have Authelia with lldap as backend.

I setup Authelia as per guide:

    clients:
      - client_id: jellyfin
        client_secret: ...
        token_endpoint_auth_method: client_secret_post
        authorization_policy: one_factor
        redirect_uris:
          - https://jellyfin.mywebsite.com/sso/OID/redirect/authelia

and Jellyfin:

I can login with the test user on Authelia and the user belongs to the jellyfin_user group.

(for the record, I tested authelia with another OIDC provider before and it did work).

Is there anything obvious I am missing?

[cellulosa]

aye my bad, I missed the whole section about creating the SSO login button - I thought the login would be the same