base64url/base64url.go
func Encode(data []byte) string {
	result := base64.StdEncoding.EncodeToString(data)
	result = strings.Replace(result, "+", "-", -1) // 62nd char of encoding
	result = strings.Replace(result, "/", "_", -1) // 63rd char of encoding
	result = strings.Replace(result, "=", "", -1)  // Remove any trailing '='s
	
	return result
}
func Encode(data []byte) string {
	result := base64.StdEncoding.EncodeToString(data)
	result = strings.Replace(result, "+", "-", -1) // 62nd char of encoding
	result = strings.Replace(result, "/", "_", -1) // 63rd char of encoding
	result = strings.Replace(result, "=", "", -1)  // Remove any trailing '='s
	
	return result
}
// Encode encodes given byte array to base64url string