List invoices by a specific order

Example response

{
  "result": [
    {
      "comments": "sample comments",
      "currency": "sample currency",
      "custom_fields": [
        {
          "param_name": "sample param_name",
          "string_value": "sample string_value"
        }
      ],
      "invoice_number": "sample invoice_number",
      "invoice_to": "sample invoice_to",
      "items": [
        {
          "spec_name": "sample spec_name"
        }
      ],
      "order_reference": "sample order_reference",
      "order_title": "sample order_title",
      "payment_method": "sample payment_method",
      "prepared_by": "sample prepared_by",
      "reference_number": "sample reference_number",
      "status": "sample status",
      "transactional_currency": "sample transactional_currency"
    }
  ],
  "status_reason": "sample status_reason"
}