code: func (s *APIServer) getClusterCACert(auth ClientI, w http.ResponseWriter, r *http.Request, p httprouter.Params, version string) (interface{}, error) {
  	localCA, err := auth.GetClusterCACert()
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  
  	return localCA, nil
  }
docs: // getClusterCACert returns the CAs for the local cluster without signing keys.