curl --request GET \
  --url https://api.wavix.com/v3/messages/opt-outs \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "phone_number": "15551234567",
      "sender_id": "MySender",
      "campaign_id": null,
      "created_at": "2024-01-15T10:30:00Z"
    },
    {
      "phone_number": "15559876543",
      "sender_id": null,
      "campaign_id": "C123456",
      "created_at": "2024-01-16T14:45:00Z"
    }
  ],
  "pagination": {
    "current_page": 1,
    "per_page": 25,
    "total": 2,
    "total_pages": 1
  }
}