Freepbx16 on debian11 user...sh: 1: runuser: not found

runuser what is that. I have asterisk user? is that a thing I did a search for runuser in my debian 11

# apt search runuser
Sorting... Done
Full Text Search... Done

I got nothing am i missing a program or a repository I need to add to get that where do i get that?

Dicko I am not running a very old debian distro?

I use fwconsole am I miss understanding you?

I looked up /etc/default/asterisk and added user group but still nothing

# cat /etc/default/asterisk
AST_USER="asterisk"
AST_GROUP="asterisk"