code: func (s *APIServer) getRemoteCluster(auth ClientI, w http.ResponseWriter, r *http.Request, p httprouter.Params, version string) (interface{}, error) {
  	cluster, err := auth.GetRemoteCluster(p.ByName("cluster"))
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  	return rawMessage(services.MarshalRemoteCluster(cluster, services.WithVersion(version), services.PreserveResourceID()))
  }
docs: // getRemoteCluster returns a remote cluster by name