j-qby

**Issue Summary** Keycloak 18 has [changed the logout mechanism](https://www.keycloak.org/2022/04/keycloak-1800-released#_openid_connect_logout_improvements) to be more OIDC-compliant. It [now requires](https://www.keycloak.org/docs/latest/server_admin/#rp-initiated-logout) a `post_logout_redirect_uri` (note the difference `..._uri` vs. `..._url`) and an `id_token_hint` for an RP-Initiated...