public ActionResult Configure()
        {
            var model = new ConfigurationModel();
            model.Vmid = _chinabankPaymentSettings.Vmid;
            model.Key = _chinabankPaymentSettings.Key;
            model.AdditionalFee = _chinabankPaymentSettings.AdditionalFee;

            return View("~/Plugins/Payments.Chinabank/Views/PaymentChinabank/Configure.cshtml", model);
        }
        public ActionResult Configure(ConfigurationModel model)
        {
            if (!ModelState.IsValid)
                return Configure();

            //save settings
            _chinabankPaymentSettings.Vmid = model.Vmid;
            _chinabankPaymentSettings.Key = model.Key;
            _chinabankPaymentSettings.AdditionalFee = model.AdditionalFee;
            _settingService.SaveSetting(_chinabankPaymentSettings);

            return View("~/Plugins/Payments.Chinabank/Views/PaymentChinabank/Configure.cshtml", model);
        }