code: func handleGetPass(r *Request) (interface{}, error) {
  	fmt.Print(r.Args.One().MustString())
  	data, err := terminal.ReadPassword(int(os.Stdin.Fd())) // stdin
  	fmt.Println()
  	if err != nil {
  		return nil, err
  	}
  	return string(data), nil
  }
docs: // handleGetPass reads a line of input from a terminal without local echo.