WIFI definitions on HASSIO

sorry please ignore, so i have come to learn that when i ssh into hassio.local i takes me right into the OS itself, as root. I was thinking that hassos is containerized so i was trying to reach the host OS itself by typing ‘login’… anyhow long story short i created a user and then used login and it brought me back to the same thing…

I am trying to install wifi but having issues. The following (Guide: Connecting Pi with Home Assistant OS to wifi (or other networking changes)) says to use nmcli command but nmcli command is not found.