public async Task <bool> Logout(string logouttoken) { bool result = false; using (HttpClient httpClient = new HttpClient(new NativeMessageHandler())) { string data = JsonConvert.SerializeObject(logouttoken); var content = new StringContent(data, Encoding.UTF8, "application/json"); var url = string.Format(App.BaseUrl + "/api/user/logout? format=json&token=" + logouttoken); var response = await httpClient.PostAsync(url, content); Datamanager dataManager = new Datamanager(); if (response.IsSuccessStatusCode == true) { result = true; dataManager.DeleteCookieData(); } else { result = false; } } return(result); }