Channel Users for #a
Channel Users List
See who's in #a and browse user history
This feature is not currently enabled for #a.
Enable the Live Channel Bot and the Users List option in channel settings to display the current user list and user history.
Current Users
See who's online right now with status (ops, voice, etc.) and linked accounts.
User History
Browse who has joined in the past, when they were last seen, and quit messages.
Channel administrators can enable this feature in the channel Admin settings. Ask a channel admin to enable the Live Channel Bot and the Users List option.