curl --request GET \
  --url 'https://api.stateset.com/api/v1/gl/periods' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "periods": [
    {
      "closed_at": null,
      "closed_by": null,
      "created_at": "string",
      "end_date": "string",
      "fiscal_year": 1,
      "id": "string",
      "locked_at": null,
      "locked_by": null,
      "period_name": "string",
      "period_number": 1,
      "start_date": "string",
      "status": "string"
    }
  ],
  "total": 1
}