Unable to log into the Live User

[kumarasinghe]

It seems the final system has no valid user accounts at all. I get the login screen, but can't login with an any user account. Then I switched to a virtual terminal and tried to login as "user", "casper", "ubuntu" and even "root"... but failed.
Then I set a root password and changed distroshare-ubuntu-imager.sh as following:

Testing for GDM and applying specific changes for it

if [ "${DM}" == "GDM" ]; then
mkdir -p /etc/gdm
echo "[daemon]
AutomaticLoginEnable=true
AutomaticLogin=root

TimedLoginEnable = false

" > /etc/gdm/custom.conf
fi

Now the live system logs in fine.

I'm on Ubuntu Gnome 15.04

User accountt seetings as seen in the live system now:

What's going on? Thanks!