I build and restart with the new generation. No new users are added to the login screen.
I use X11 & GNOME. Looked in the manual and searched for tutorials, but I still don’t know where the cause of the problem lies (maybe it’s GNOME).
I am unexperienced with both NixOS and Linux in general, so I wish the necessity of specifying the home directories (if that was the problem) was mentioned in the manual.
I also can’t find where the difference between users and extraUsers is described.