Hi @Wind,
Didn’t test, but from top of my head, maybe you could use a “Logged-in” field in the user, that when user logins you set that to “True”, when users logs outs if updates to “False”.
Also set a toogle button to user, if he wants to set as “Appear Logged out” or come back again to loggedin (so change status logged-in to true/false)
Then you create a greencircle and another red circle and you display with a condition visibility showing green if loggedin = true and red if loggedin = false.