一个 8xx 号码，
覆盖美国和加拿大。

const { data: page, error: searchError } = await bird.numbers.available
  .list({
    country_code: "US",
    number_type:  "toll_free",
    capabilities: ["sms"],
  })
  .safe();
if (searchError) throw searchError;

const { data: order, error: orderError } = await bird.numbers.orders
  .create({ number: page.data[0].number })
  .safe();
if (orderError) throw orderError;

console.log(order.status, order.number_id); // → "completed" "nda_0ydh2yfw..."