curl --request PATCH \
  --url https://api.getsly.ai/v1/v1/acp/checkouts/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "merchant_id": "<string>",
  "items": [
    {
      "sku": "<string>",
      "quantity": 123,
      "unit_price": "<string>",
      "currency": "<string>"
    }
  ],
  "payment_method": "card",
  "metadata": {}
}
'

{
  "data": {
    "id": "<string>",
    "merchant_id": "<string>",
    "items": [
      {
        "sku": "<string>",
        "quantity": 123,
        "unit_price": "<string>",
        "currency": "<string>"
      }
    ],
    "total": "<string>",
    "currency": "<string>",
    "expires_at": "2023-11-07T05:31:56Z",
    "created_at": "2023-11-07T05:31:56Z",
    "shipping_address": {
      "line1": "<string>",
      "city": "<string>",
      "postal_code": "<string>",
      "country": "<string>",
      "line2": "<string>",
      "state": "<string>"
    },
    "payment_method": "card",
    "client_secret": "<string>",
    "metadata": {}
  }
}