Configure automatic login and encrypt your drive. Shows only "enter passphrase" and is actually secure instead of just a cosmetic password prompt.
slight disagree. While encryption is very useful, it requires a full shutdown or hibernation to do what a normal "sleep" or "lock" would do. definitely not the most convenient setup. I'd say OP should just change his username to something else.
Hibernation does not take that long with a modern ssd. Convenience and security often don't go hand in hand. Locking the laptop usually is sufficient too for switching trains etc.
I'm not on Debian, but a quick search led me to this wiki link from Arch. Give it a whirl:
https://wiki.archlinux.org/title/GDM#Hide_user_from_login_list
Edit: context of the Arch wiki link, in case better answers can be gleaned from it, I found it on AskUbuntu: https://askubuntu.com/questions/2471/how-to-hide-users-from-the-gdm-login-screen
OP, you might want to just change your username.
I dont know of an easy, clean and elegant way of doing what you ask. I wonder what happens if you edit /etc/passwd with the new name, I wouldn't dare to try. The way I'd proceed though is to start a bare repo with my dotfiles, so if anything happens, I'm back in business with minimal configuration changes.
This is a video about bare git repo: https://www.youtube.com/watch?v=tBoLDpTWVOM&t=0
Stolen from this other video: https://www.youtube.com/watch?v=ApkoY-PN0Nk&t=0
how will it know which user to pass over to PAM log in? i think the best way would be to edit the gdm source code, hardcode your username into it, remove the output of names, and compile your own. it will be a lot of work though.
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.