docs: protected String getRegisteredServiceJwtProperty(final RegisteredService service, final RegisteredServiceProperty.RegisteredServiceProperties propName) {
          if (service == null || !service.getAccessStrategy().isServiceAccessAllowed()) {
              LOGGER.debug("Service is not defined/found or its access is disabled in the registry");
              throw new UnauthorizedServiceException(UnauthorizedServiceException.CODE_UNAUTHZ_SERVICE);
          }
          if (propName.isAssignedTo(service)) {
              return propName.getPropertyValue(service).getValue();
          }
          LOGGER.warn("Service [{}] does not define a property [{}] in the registry", service.getServiceId(), propName);
          return null;
      }