curl --request GET \
  --url http://localhost:3091/v1/api/admin/reference/countries

{
  "success": true,
  "message": "<string>",
  "data": [
    {
      "id": 123,
      "nom": "<string>",
      "parentNom": "<string>",
      "childrenCount": 123
    }
  ],
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>"
  },
  "timestamp": "2023-11-07T05:31:56Z"
}