code: func infoHandler(c *router.Context) {
  	s := GetSigner(c.Context)
  	if s == nil {
  		httpReplyError(c, http.StatusNotFound, "No Signer instance available")
  		return
  	}
  	info, err := s.ServiceInfo(c.Context)
  	if err != nil {
  		httpReplyError(c, http.StatusInternalServerError, fmt.Sprintf("Can't grab service info - %s", err))
  	} else {
  		httpReply(c, http.StatusOK, info)
  	}
  }
docs: // infoHandler returns information about the current service identity.