curl --request GET \
  --url https://sandbox-api.billingrails.com/v1/invoices \
  --header 'Authorization: Bearer <token>'

{
  "invoices": [
    {
      "object": "invoice",
      "id": "inv_IhMUl3rrZ3",
      "created_at": "2025-02-14T17:33:40.843Z",
      "account_id": "acc_IhMUl3rrZ3",
      "subscription_id": "sub_IhMUl3rrZ3",
      "meter_id": "meter_IhMUl3rrZ3",
      "plan_id": "plan_IhMUl3rrZ3",
      "status": "draft",
      "currency": "NGN",
      "amount": 1000,
      "due_date": "2025-02-14T17:33:40.843Z",
      "billing_start": "2025-02-14T17:33:40.843Z",
      "billing_end": "2025-02-14T17:33:40.843Z",
      "metadata": null
    }
  ]
}