//public Platform(string appKey, string appSecret, string apiEndPoint)
        //{
        //    AppKey = appKey;
        //    AppSecret = appSecret;
        //    ApiEndpoint = apiEndPoint;
        //    Auth = new Auth();
        //    _client = new HttpClient { BaseAddress = new Uri(ApiEndpoint) };
        //}

        public Platform(string appKey, string appSecret, string apiEndPoint, string appName, string appVersion)
        {
            AppKey = appKey;
            AppSecret = appSecret;
            ApiEndpoint = apiEndPoint;
            Auth = new Auth();
            _client = new HttpClient {BaseAddress = new Uri(ApiEndpoint)};
            SetUserAgentHeader(appName, appVersion);
        }