code: func (s *APIServer) getRemoteClusters(auth ClientI, w http.ResponseWriter, r *http.Request, p httprouter.Params, version string) (interface{}, error) {
  	clusters, err := auth.GetRemoteClusters()
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  	items := make([]json.RawMessage, len(clusters))
  	for i, cluster := range clusters {
  		data, err := services.MarshalRemoteCluster(cluster, services.WithVersion(version), services.PreserveResourceID())
  		if err != nil {
  			return nil, trace.Wrap(err)
  		}
  		items[i] = data
  	}
  	return items, nil
  }
docs: // getRemoteClusters returns a list of remote clusters