curl --request GET \
  --url https://api.vambe.me/api/public/email-campaign \
  --header 'x-api-key: <x-api-key>'

{
  "campaigns": [
    {
      "id": "<string>",
      "title": "<string>",
      "email_template_id": "<string>",
      "email_channel_id": "<string>",
      "scheduled_at": "2023-11-07T05:31:56Z",
      "sent_at": "2023-11-07T05:31:56Z",
      "total_recipients": 123,
      "created_at": "2023-11-07T05:31:56Z"
    }
  ],
  "hasMore": true
}