curl --request GET \
  --url https://{operatorDomain}/v1/public/finance/documents/by-reference

{
  "data": {
    "id": "<string>",
    "reference": "2026-000123",
    "kind": "invoice",
    "bookingId": "<string>",
    "currency": "<string>",
    "totalCents": 123,
    "download": {}
  }
}