curl --request GET \
  --url https://api.myrouter.example/api/v1/billing/invoices \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "period_start": "2023-11-07T05:31:56Z",
      "period_end": "2023-11-07T05:31:56Z",
      "currency": "<string>",
      "opening_balance": "<string>",
      "credit_purchase_total": "<string>",
      "usage_charge_total": "<string>",
      "refund_total": "<string>",
      "adjustment_total": "<string>",
      "closing_balance": "<string>"
    }
  ],
  "request_id": "<string>"
}