code: @Override
      protected void timeoutMessage(Set<String> requiredSslRefs, ReadyListener listener) {
          if (!super.check(requiredSslRefs)) {
              super.timeoutMessage(requiredSslRefs, listener);
          }
          if (userRegistries.isEmpty()) {
              Tr.error(tc, "NO_USER_REGISTRY", listener.listenerId(), TIMEOUT_SECONDS);
          }
      }
docs: {@inheritDoc}