Traffic Stats API GET /online

[shakibamoshiri]

Is your feature request related to a problem? Please describe.
cannot we say it is problem, but it is useful for better user management

Describe the solution you'd like
The Traffic Stats API has two endpoints

• /traffic to get the rx and tx
• /kick to disconnect an online user

in terms of user management, the third one is missing

• /online to show/list connected users

Describe alternatives you've considered
As an alternative, a polling script can check every N minutes if a user tx-rx is 0 or not.
if they are 0, the user is not online
if they are non-zero, save them on database and /traffic?clear=all them
at last check tr-tx again, the ones their values are non-zero are online

this is how xray (project X) panel (e.g x-ui 3x-ui, etc) are handling the online list

Additional context
A server like SoftEther has API to check online users ,
A server like ocserv has a CLI (occtl) to list online users
And xray with a workaround we can check
but the standard and the straightforward way is a built-in API