Need to update principals for zulip stream

Feature Requests
1

Hi,

Zulip stream could create with principals, but can not update its principals
It is very important to update user subcriptions

Could you check for it?

2

If I understand correctly, you are looking for a Zulip Trigger?

3

I 've done it. It has some other way to use this node.
At first, it 's rather strange for me.