List URL Groups

curl https://qstash.upstash.io/v2/topics \
  -H "Authorization: Bearer <token>"

[
  {
  
    "createdAt": 1623345678001,
    "updatedAt": 1623345678001,
    "name": "my-url-group",
    "endpoints": [
      {
        "name": "my-endpoint",
        "url": "https://my-endpoint.com"
      }
    ]
  },
  // ...
]