const { result, error } = await unprice.paymentMethods.create({
  customerId: "cus_1234567890",
  paymentProvider: "stripe",
  successUrl: "https://example.com/success",
  cancelUrl: "https://example.com/cancel"
});

if (error) {
  // handle potential network or bad request error
  // a link to our docs will be in the `error.docs` field
  console.error(error.message);
  return;
}

console.log(result);

{
  "success": true,
  "url": "https://checkout.stripe.com/pay/cs_test_1234567890"
}