private void btnGetCustomers_Click(object sender, EventArgs e)
        {
            btnGetCustomers.Text = "Getting Customers...";
            var customerResource = new CustomerAccountResource(_apiContext);
            CustomerAccountCollection customers = customerResource.GetAccounts();

            if (customers != null && customers.Items.Count > 0)
                dataGridViewCustomers.DataSource = customers.Items;
            btnGetCustomers.Text = "Refresh Customer List";
        }