{
  services.openssh = {
    enable = true;
    settings = {
      PasswordAuthentication = false;
    };
  };
  users.users.root.openssh.authorizedKeys.keys = [
    ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKQNIDqvhcfLKIDJybVI0o32CSDZpBXxjRxXj6OVQ93E khais@nixos''
    ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK9C7ssXUVVMKOxfJOumkP3dUWVtC3cBPlCIl6ZZc8ug khais@void''
  ];
}