authentik:
    env:
        KEYCLOAK_ID: authentik
        KEYCLOAK_NAME: sso
        KEYCLOAK_URL: https://authentik.example.com/application/o/matrix/
        KEYCLOAK_CLIENT_DOMAIN: https://element-web.example.com
        KEYCLOAK_ALLOW_EXISTING_USERS: "true"
        KEYCLOAK_CLIENT_ID: matrix
    uncomment:
        - compose.keycloak.yml
        - KEYCLOAK_ENABLED
        - KEYCLOAK_CLIENT_ID
        - SECRET_KEYCLOAK_CLIENT_SECRET_VERSION
    shared_secrets:
        matrix_secret: keycloak_client_secret