Remove the default password

[mks-h]

Issue Description

At first boot to the newly installed system, if you lock the screen you have to input the passwords to unlock it. The password is "vanilla", same as the username. IMHO, this is a confusing behavior to which I've accustomed only because this is not too uncommon. But I imagine this being an issue for newcomers to Linux, or people who don't usually distro-hop.

Steps to Reproduce

• Install the system
• Reboot into newly-installed system
• Lock the screen from the quick settings menu (or by a time out on inactivity)

On what version of Vanilla OS this happens?

Unreleased

Additional Information

No response