Private Extensions

Is there currently or are there plans to add a way to make private extensions? Extensions usable by only certain broadcasters but visible to all viewers?

It would be useful for channels trying to develop extensions that have components irrelevant to the general public, like maybe a Twitch-Plays channel which may want to give extra game information to players, but the extension would be not only unusable but useless to anyone else.

You can already whitelist extensions to specific channels so only they can install them.

It asks for an account ID, where I can find it?

I used here for a quick lookup on IDs by name. Otherwise you need to call the Twitch API yourself to translate usernames into IDs.

Thank you very much!