Is there any way to disable the change in Jitsi Displayname when asking to join lobby?

Hello!

I’m using the Jitsi lobby feature in a room and I’m using the external iframe API.
Right now I’d like the users to join with the username they’ve been registered at my website by asking to join the lobby with that usernames that the website can give the API.

Right now the guest interface where they can press the “Ask to join” button gives them the chance to change their username. Is there any way to block them from changing that username when they press “Ask to join”?

Thank you so much!