public async void SendPushNotification(string message, mPushType type)
        {
            topic = BuildTopic();
            string url = BuildRequestParams(topic, message, type);

            await HttpGet(url);
        }
        private string BuildRequestParams(string topic, string message, mPushType type)
        {
            string url = null;

            try
            {
                builder = new UriBuilder(endpoint);
                query   = HttpUtility.ParseQueryString(builder.Query);

                query["topic"]   = topic;
                query["message"] = message;
                query["type"]    = type.ToString();
                builder.Query    = query.ToString();
                url = builder.ToString();

                return(url);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }