{name_user} field in Blynk 2.0

hello my Blynk friends, my question is the following, is there a field to call in automations or in the code that brings me the name of the user who is using the Blynk application at that moment? My need is to be able to send a notification to the rest of the users (by pressing a button) that gives me data on the user who presses it. Is it possible?..thank you…

@KazaDoor hello, please clarify - does the user press the button on the hardware or in the mobile/web app?

In the mobile/web, users will not have hardware, only app.

In principle I want to know if it is possible to avoid having to use hardware for each user, otherwise it would be a device for each user, but it is not what I would like.