curl --request GET \
  --url https://api.vzaps.com/instances/{id}/queue/messages \
  --header 'Authorization: Bearer <token>'

{
  "code": 200,
  "success": true,
  "data": {
    "count": 1,
    "messages": [
      {
        "id": "90B2F8B13FAC8A9CF6B06E99C7834DC5",
        "type": "text",
        "status": "queued"
      }
    ]
  }
}