code: func (proxy *ProxyClient) ClusterAccessPoint(ctx context.Context, clusterName string, quiet bool) (auth.AccessPoint, error) {
  	if clusterName == "" {
  		return nil, trace.BadParameter("parameter clusterName is missing")
  	}
  	clt, err := proxy.ConnectToCluster(ctx, clusterName, quiet)
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  	return proxy.teleportClient.accessPoint(clt, proxy.proxyAddress, clusterName)
  }
docs: // ClusterAccessPoint returns cluster access point used for discovery
  // and could be cached based on the access policy