/// <summary>
        /// Create a daylight test run
        /// </summary>
        /// <param name="testRun">TestRun Object that holds all the metadata about test run</param>
        /// <param name="testSettings">TestSettings object that hold all the daylight and Zumo App configuration</param>
        /// <returns>The run id of the newly created test run</returns>
        public static async Task<string> CreateDaylightRun(TestRun testRun, TestSettings testSettings)
        {
            var authHeader = await GetAuthHeader(testSettings);
            if (authHeader == null)
                return String.Empty;
            using (var c = new HttpClient())
            {
                c.DefaultRequestHeaders.Authorization = authHeader;
                JsonSerializerSettings jss = new JsonSerializerSettings();
                jss.DefaultValueHandling = DefaultValueHandling.Ignore;
                string runObj = JsonConvert.SerializeObject(testRun, jss);
                var content = new StringContent(runObj.ToString(), Encoding.UTF8, "application/json");
                var resp = await c.PostAsync(string.Format("{0}/api/{1}/runs", testSettings.Custom["DayLightUrl"], testSettings.Custom["DaylightProject"]), content);
                if (!resp.IsSuccessStatusCode)
                {
                    return String.Empty;
                }

                string respBody = resp.Content.ReadAsStringAsync().Result;
                TestRun newRun = JsonConvert.DeserializeObject<TestRun>(respBody);
                return newRun.RunId;
            }
        }