The changes update the configuration to use a `device.user` variable instead of hardcoded usernames like "fs0c131y" and "servius". This makes the configurations more flexible and reusable across different devices. The changes affect nixos configurations for mirai, ryu, and tako, as well as the darwin configuration for kuro, and the deploy.nix file.
The key changes include:
- Replacing hardcoded usernames with `device.user` in trusted-users lists
- Updating system.primaryUser to use `device.user`
- Modifying user definitions to use the device.user variable
- Adjusting deploy configuration to use "servius" as sshUser for tako
- Commenting out some service modules in tako's services/default.nix
