static void Main(string[] args)
    {
        // Find your Account Sid and Auth Token at twilio.com/user/account
        string AccountSid = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        string AuthToken = "your_auth_token";
        var twilio = new TwilioRestClient(AccountSid, AuthToken);

        twilio.UpdateUsageTrigger("UT33c6aeeba34e48f38d6899ea5b765ad4", "Monthly Maximum Call Usage", "https://www.example.com/monthly-usage-trigger", null);
    }