User name and password change?

[AndyM]

Phosh automatically starts with user 1000 (alarm in your case)

This is governed bu the phosh.service from systemd:  /etc/systemd/system/graphical.target.wants/phosh.service

Code:

[Service]
Environment=XDG_CURRENT_DESKTOP=Phosh:GNOME
Environment=XDG_SESSION_DESKTOP=phosh
Environment=XDG_SESSION_TYPE=wayland
ExecStart=/usr/bin/phosh
TimeoutStartSec=30
User=1000
PAMName=login
WorkingDirectory=~
Restart=on-failure
RestartSec=5s

of course if you change this then every time phosh is updated it will revert to User=1000.

You need to change the username and home directory for user 1000 (alarm) as above