const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.keystoneos.xyz/v1/platforms/me/environments', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "platform_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "slug": "<string>",
      "auth0_client_id": "<string>",
      "webhook_url": "<string>",
      "api_version": "<string>",
      "default_timeout_seconds": 123,
      "is_active": true,
      "rate_limit_rpm": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ],
  "total": 123,
  "limit": 123,
  "offset": 123
}