The gluebuddy client is required for gluebuddy to retrieve users and
groups membership without being able to change other keycloak data. The
realm-management roles cannot be assigned yet via keycloak as it does
not know about the roles and realm-management client.

Install keycloak-metrics-spi and configure it to provide prometheus
endpoints available as auth/realms/$realm/metrics. The prometheus
metrics are behind basic_auth as some metrics might be sensitive or can
be used by attackers. #23