curl --request GET \
  --url https://api.gameboost.com/v2/item-orders/{itemOrder}/messages \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "type": "user_message",
      "text": "<string>",
      "attachment": {},
      "sender": {
        "id": 123,
        "username": "<string>",
        "is_admin": true
      },
      "sent_at": 123
    }
  ],
  "message": "<string>"
}