curl --request GET \
  --url https://rest.staging.nickel.com/bill \
  --header 'Authorization: Bearer <token>'

{
  "bills": [
    {
      "id": "<string>",
      "amountDueInCents": 123,
      "totalAmountInCents": 123,
      "vendorId": "<string>",
      "vendorName": "<string>",
      "dueDate": "<string>",
      "reference": "<string>",
      "status": "<string>",
      "documents": [
        "<string>"
      ]
    }
  ],
  "totalResults": 123
}