curl --request GET \
  --url http://localhost:8000/api/v1/mail/threads \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "history_id": "<string>",
      "messages": [
        {
          "id": "<string>",
          "body": "<string>",
          "html_body": "<string>",
          "user_id": "<string>",
          "date": "<string>",
          "snippet": "<string>",
          "subject": "<string>",
          "thread_id": "<string>",
          "starred": true,
          "unread": true,
          "cc": [
            {
              "email": "<string>",
              "name": "<string>"
            }
          ],
          "bcc": [
            {
              "email": "<string>",
              "name": "<string>"
            }
          ],
          "from": [
            {
              "email": "<string>",
              "name": "<string>"
            }
          ],
          "reply_to": [
            {
              "email": "<string>",
              "name": "<string>"
            }
          ],
          "labels": [
            "<string>"
          ],
          "in_reply_to": "<string>"
        }
      ]
    }
  ],
  "meta": {
    "limit": 123,
    "cursors": {
      "before": "<string>",
      "current": "<string>",
      "next": "<string>"
    }
  }
}