Zulip - Need functionality to unsubscribe a user

[cmdntd987]

Zulip node lacks the functionality to unsubscribe a user.
We discussed about this issue:

Zulip - I do not know how to unsubcribe user from a stream?

It is easy to subcribe a stream But how to unsubcribe user from a stream? Could you help me know how to use/change this function to unsubcribe? [chrome_x1eHRi3Ddy]

Could you update this on next version?