curl --request GET \
  --url 'https://api.keyapi.ai/v1/reddit/fetch_user_active_subreddits?username=spez&need_format=false' \
  --header 'Authorization: Bearer <YOUR_API_KEY>'

{
  "code": 0,
  "message": "success",
  "data": {
    "redditorInfoByName": {
      "__typename": "Redditor",
      "activeSubreddits": null
    }
  },
  "requestId": "932e4837-563b-4cb0-a882-6964f69ba9f9"
}