Disable user name completion?

Hi

Is it possible to disable username completion when adding users to a channel? I want the my users to add users to channels if they know the fullname.

Basically I do not want my users to invite the people they do not know about.

I believe the guest role should prevent users from seeing users not in the current channel.

If not there are permissions to restrict this

@aaron.ogle

Thanks for the reply. The thing is the guest account is disabled. Can you please tell me what permission does that? I tried to limit some permissions but I still have an issue with it :frowning:

I replicated the guest user role as another one and tested with a user of the new role, and that does not help me :frowning:

It is also weird that I disabled all the permissions to adding any user to any channel/discussion in that role but the user stil able to add users regardless. The guest role suffers from the same issue too. I wonder if this is a bug