public IEnumerator Update <T> (T item, Action <IRestResponse <T> > callback = null) where T : new()
        {
            string id = null;
            // Check if model uses the 'IDataModel' Interface to get id property, otherwise try Refelection (using 'Model' helper).
            IDataModel model = item as IDataModel;

            if (model != null)
            {
                id = model.GetId();
            }
            else if (Model.HasField(item, "id"))
            {
                var x = Model.GetField(item, "id");
                id = x.GetValue(item) as string;
            }
            else
            {
                Debug.LogError("Unable to get 'id' data model property");
            }
            if (string.IsNullOrEmpty(id))
            {
                Debug.LogError("Error 'id' value is missing");
                yield return(null);
            }
            string      url     = string.Format("{0}/{1}{2}/{3}", _client.AppUrl, URI_TABLES, _name, id);
            ZumoRequest request = new ZumoRequest(_client, url, Method.PATCH);

            request.AddBody(item);
            Debug.Log("Update Request Url: " + url + " patch:" + item);
            yield return(request.request.Send());

            request.ParseJson <T> (callback);
        }
        public IEnumerator Lookup <T> (string id, Action <IRestResponse <T> > callback = null) where T : new()
        {
            string      url     = string.Format("{0}/{1}{2}/{3}", _client.AppUrl, URI_TABLES, _name, id);
            ZumoRequest request = new ZumoRequest(_client, url, Method.GET);

            Debug.Log("Lookup Request Url: " + url);
            yield return(request.request.Send());

            request.ParseJson <T> (callback);
        }
        /// <summary>
        /// Invokes custom API for HTTP Methods: GET, POST, PUT, PATCH, DELETE
        /// </summary>
        public IEnumerator InvokeApi <T> (string apiName, Method httpMethod, Action <IRestResponse <T> > callback = null) where T : new()
        {
            string url = string.Format("{0}/{1}{2}", AppUrl, URI_API, apiName);

            Debug.Log(httpMethod.ToString() + " custom API Request Url: " + url);
            ZumoRequest request = new ZumoRequest(this, url, httpMethod);

            yield return(request.request.Send());

            request.ParseJson <T> (callback);
        }
        public IEnumerator Insert <T> (T item, Action <IRestResponse <T> > callback = null) where T : new()
        {
            string      url     = string.Format("{0}/{1}{2}", _client.AppUrl, URI_TABLES, _name);
            ZumoRequest request = new ZumoRequest(_client, url, Method.POST);

            Debug.Log("Insert Request: " + url);
            request.AddBody(item);
            yield return(request.request.Send());

            request.ParseJson <T> (callback);
        }
        /// <summary>
        /// Client-directed single sign on (POST with access token)
        /// </summary>
        public IEnumerator Login(MobileServiceAuthenticationProvider provider, string token, Action <IRestResponse <MobileServiceUser> > callback = null)
        {
            string p   = provider.ToString().ToLower();
            string url = string.Format("{0}/.auth/login/{1}", AppUrl, p);

            Debug.Log("Login Request Url: " + url + " access token: " + token);
            ZumoRequest request = new ZumoRequest(this, url, Method.POST);

            request.AddBodyAccessToken(token);
            yield return(request.request.Send());

            request.ParseJson <MobileServiceUser> (callback);
        }