client, err := pinentry.NewClient(
		pinentry.WithDesc("My description"),
		pinentry.WithGPGTTY(),
		pinentry.WithPrompt("My prompt:"),
		pinentry.WithTitle("My title")
	)
	if err != nil {
		return err
	}
	defer client.Close()

	switch pin, fromCache, err := client.GetPIN(); {
	case pinentry.IsCancelled(err):
		fmt.Println("Cancelled")
	case err != nil:
		return err
	case fromCache:
		fmt.Printf("PIN: %s (from cache)\n", pin)
	default:
		fmt.Printf("PIN: %s\n", pin)
	}