code: def register_endpoints(self, backend_names):
          
          url_map = [("^{}".format(self.name), self.ping_endpoint)]
  
          return url_map
docs: See super class satosa.frontends.base.FrontendModule
          :type backend_names: list[str]
          :rtype: list[(str, ((satosa.context.Context, Any) -> satosa.response.Response, Any))]
          :raise ValueError: if more than one backend is configured