curl --request GET \
  --url https://api.eflow.team/v1/networks/billings/account/invoices \
  --header 'X-Eflow-Api-Key: <api-key>'

{
  "invoices": [
    {
      "invoice_id": 123,
      "network_id": 123,
      "billing_period_start": "<string>",
      "billing_period_end": "<string>",
      "amount": 123,
      "status": "<string>",
      "time_created": 123
    }
  ],
  "paging": {
    "page": 123,
    "page_size": 123,
    "total_count": 123
  }
}