window.Pelcro.order.create({
  auth_token: window.Pelcro.user.read().auth_token, 
  plan_id: 1234,
  address_id: 321,
  coupon_code: "50OFF"
}, (error, response) => {
  if (error) {
    return console.log("error", error.message);
  }

  const orderSummary = response.data.plan;
  console.log(orderSummary);
});