auth

var GetIDToken = func(ctx context.Context) (string, error) {
	creds, err := google.FindDefaultCredentials(ctx, scopes...)
	if err != nil {
		return "", fmt.Errorf("failed to find default credentials: %w", err)
	}

	token, err := creds.TokenSource.Token()
	if err != nil {
		return "", err
	}

	idToken, ok := token.Extra("id_token").(string)
	if !ok {
		return "", fmt.Errorf("token response did not contain an id_token")
	}

	return idToken, nil
}