curl --request GET \
  --url https://api.upwell.com/api/rest/bills

{
  "bills": [
    {
      "billLineItems": [
        {
          "createdAt": "2023-11-07T05:31:56Z",
          "description": "<string>",
          "id": "<string>",
          "item": "<string>",
          "lineNumber": "<string>",
          "quantity": 123,
          "sourceSystem": "<string>",
          "sourceSystemId": "<string>",
          "totalAmount": 123,
          "unitPrice": 123,
          "updatedAt": "2023-11-07T05:31:56Z"
        }
      ],
      "carrierId": "<string>",
      "checkOrAchNumber": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "currency": "AED",
      "dueDate": "<string>",
      "id": "<string>",
      "issueDate": "<string>",
      "notes": "<string>",
      "payToAccount": "<string>",
      "proNumber": "<string>",
      "referenceNumber": "<string>",
      "sourceSystem": "<string>",
      "sourceSystemId": "<string>",
      "sourceSystemMeta": "<unknown>",
      "status": "<string>",
      "terms": "<string>",
      "totalAmount": 123,
      "updatedAt": "2023-11-07T05:31:56Z",
      "vendor": {
        "createdAt": "2023-11-07T05:31:56Z",
        "id": "<string>",
        "name": "<string>",
        "sourceSystem": "<string>",
        "sourceSystemId": "<string>",
        "sourceSystemMeta": "<unknown>",
        "updatedAt": "2023-11-07T05:31:56Z"
      },
      "vendorId": "<string>"
    }
  ]
}