private async void InitializeData()
        {
            DialogService       _dialogService       = new DialogService();
            CustomerDataService _customerDataService = new CustomerDataService();

            if (Application.Current.Properties.ContainsKey("transCustomer"))
            {
                _customerEmail = (string)Application.Current.Properties["transCustomer"];

                _dialogService.ShowLoading("Loading...");
                var pricings = await _customerDataService.GetCustomersPricing(_customerEmail);

                if (pricings != null)
                {
                    CustomerPricings = pricings.ToObservableCollection();
                    _dialogService.HideLoading();
                }
                else
                {
                    _dialogService.HideLoading();
                    await _dialogService.ShowDialog("Not found", "Customer information does not exist.", "Ok");

                    var navServ = App.ViewNavigationService;
                    await navServ.GoBack();
                }
            }

            else
            {
                await _dialogService.ShowDialog("Not found", "Customer information does not exist.", "Ok");

                var navServ = App.ViewNavigationService;
                await navServ.GoBack();
            }
        }