@Override
    protected Map<String, List<Object>> returnFinalAttributesCollection(
        final Map<String, List<Object>> attributesToRelease, final RegisteredService service) {
        LOGGER.debug("CAS will not authorize anything for release, given the service is denied access to all attributes. "
                     + "If there are any default attributes set to be released to all services, "
                     + "those are also skipped for service id: [{}], id: [{}] and description: [{}]",
            service.getServiceId(), service.getId(), service.getDescription());
        return new HashMap<>();
    }
A deny rule to refuse all service from receiving attributes, whether default or not.

@author Misagh Moayyed
@since 5.0.0
core/cas-server-core-authentication-attributes/src/main/java/org/apereo/cas/services/DenyAllAttributeReleasePolicy.java