Bring "Get Followed Streams" endpoint to Helix
With the actual Helix API, there are two ways to retrieve the authenticated user's followed streams:
First, get user follows (https://dev.twitch.tv/docs/api/reference#get-users-follows) and then get all active streams details, by specifying each user_id individually. If the user is following 300 users, this would require at least 6 requests (eventually one more to get the autenticated user's id). This method is quite inefficient compared to the v5 endpoint.
The second way is to use the "Stream Changed" webhook (https://dev.twitch.tv/docs/api/webhooks-reference#topic-stream-changed). Again, I should first retrieve all user follows (3 requests for 300 follows), and then subscribe to 300 webhooks events. Again, this is a really inefficient and painful method to simply get an user's followed active streams at a given time point.
The old endpoint was really straightforward and useful for many developers. I'm sure bringing it back would be a great thing.
Documentation can be found here: https://dev.twitch.tv/docs/api/reference/#get-followed-streams