curl --request GET \
  --url https://api.novita.ai/openapi/v1/billing/monthly/bill \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>'

{
  "data": [
    {
      "billId": "<string>",
      "userId": "<string>",
      "billingMonth": "<string>",
      "totalAmount": "<string>",
      "originTotalAmount": "<string>",
      "voucherPayAmount": "<string>",
      "cashPayAmount": "<string>",
      "debtAmount": "<string>",
      "status": "<string>",
      "invoiceUrl": "<string>",
      "startTime": "<string>",
      "endTime": "<string>",
      "repaidAmount": "<string>"
    }
  ]
}