curl --request GET \
  --url https://api.ngrok.com/tunnels \
  --header 'Authorization: Bearer <token>' \
  --header 'ngrok-version: <ngrok-version>'

{
  "tunnels": [
    {
      "id": "<string>",
      "public_url": "<string>",
      "started_at": "<string>",
      "metadata": "<string>",
      "proto": "<string>",
      "region": "<string>",
      "tunnel_session": {
        "id": "<string>",
        "uri": "<string>"
      },
      "endpoint": {
        "id": "<string>",
        "uri": "<string>"
      },
      "labels": {},
      "backends": [
        {
          "id": "<string>",
          "uri": "<string>"
        }
      ],
      "forwards_to": "<string>"
    }
  ],
  "uri": "<string>",
  "next_page_uri": "<string>"
}