code: func humanErr(err error) error {
  	if err != nil {
  		if status, ok := status.FromError(err); ok {
  			return errors.New(status.Message())
  		}
  	}
  	return err
  }
docs: // humanErr takes gRPC errors and returns a human readable error that can be
  // presented in the CLI.
  //
  // It basically strips scary looking gRPC framing around the error message.