func base64URLEncode(s string) (string, error) {
	return base64.URLEncoding.EncodeToString([]byte(s)), nil
}
func base64URLEncode(s string) (string, error) {
	return base64.URLEncoding.EncodeToString([]byte(s)), nil
}
func base64URLEncode ( s string ) ( string , error ) { return base64 . URLEncoding . EncodeToString ( [ ] byte ( s ) ) , nil }
// base64URLEncode encodes the given string to be URL-safe.
base64URLEncode encodes the given string to be URL - safe .