const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    product: 'prod_9Xk2mQ1pL0vRsT',
    success_url: 'https://acme.test/welcome',
    cancel_url: 'https://acme.test/pricing',
    max_duration_seconds: 1296030
  })
};

fetch('http://localhost:4000/v1/checkout/sessions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request POST \
  --url http://localhost:4000/v1/checkout/sessions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "product": "prod_9Xk2mQ1pL0vRsT",
  "success_url": "https://acme.test/welcome",
  "cancel_url": "https://acme.test/pricing",
  "max_duration_seconds": 1296030
}
'

{
  "id": "cs_3fT8kLm2Qp9RxV",
  "object": "checkout.session",
  "status": "open",
  "livemode": true,
  "created": 123,
  "expires_at": 123,
  "success_url": "<string>",
  "cancel_url": "<string>",
  "product": {
    "id": "prod_9Xk2mQ1pL0vRsT",
    "object": "product",
    "name": "<string>",
    "description": "<string>",
    "rate_usd_per_second": "0.004",
    "rate_per_second_wei": "4000",
    "currency": "ausd",
    "allow_pause": true,
    "start_mode": "checkout",
    "active": true,
    "active_subscriptions": 123,
    "livemode": true,
    "created": 123
  },
  "merchant": {
    "name": "<string>",
    "logo_url": "<string>",
    "accent": "<string>",
    "support_url": "<string>"
  },
  "customer": "<string>",
  "subscription": "<string>",
  "max_duration_seconds": 123,
  "max_escrow_usd": "<string>"
}

{
  "error": {
    "type": "api_error",
    "message": "<string>",
    "code": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "api_error",
    "message": "<string>",
    "code": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "api_error",
    "message": "<string>",
    "code": "<string>",
    "param": "<string>"
  }
}