Remove user from Individual user permissions

What type of hardware are you using: Raspberry Pi 3, 4+
What YunoHost version are you running: 12.0.7
How are you able to access your server: The webadmin
SSH
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: no

Describe your issue

I would like to remove an user from “invidivual user permissions” group, but can’t find how

Share relevant logs or error messages

none

just find out how, removing all permissions exclude that user from that group.