Remove auth path from keycloak url

matrix-docker-ansible/inventory/host_vars/matrix.cttue.de/vars.yml

@@ -71,13 +71,14 @@ matrix_synapse_configuration_extension_yaml: |
   oidc_providers:
     - idp_id: cttue
       idp_name: "Chaostreff Tübingen SSO"
-      issuer: "https://auth.cttue.de/auth/realms/cttue"
+      issuer: "https://auth.cttue.de/realms/cttue"
       client_id: "matrix"
       client_secret: "EItmul7WaoTW6rzxxnLpGS1G9OqzmSR8"
       scopes: ["openid", "profile"]
-      authorization_endpoint: "https://auth.cttue.de/auth/realms/cttue/protocol/openid-connect/auth"
+      authorization_endpoint: "https://auth.cttue.de/realms/cttue/protocol/openid-connect/auth"
-      token_endpoint: "https://auth.cttue.de/auth/realms/cttue/protocol/openid-connect/token"
+      token_endpoint: "https://auth.cttue.de/realms/cttue/protocol/openid-connect/token"
-      userinfo_endpoint: "https://auth.cttue.de/auth/realms/cttue/protocol/openid-connect/userinfo"
+      userinfo_endpoint: "https://auth.cttue.de/realms/cttue/protocol/openid-connect/userinfo"
+      backchannel_logout_enabled: true
       user_mapping_provider:
         config:
           localpart_template: "{% raw %}{{ user.preferred_username }}{% endraw %}"