add user sandro

lib/users/sandro.nix

@@ -0,0 +1,25 @@
+{ pkgs, ... }:
+
+let
+  keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILpMhnSYDzeopiK+uDz8hQSGnJ7l2lh5Te1PWtiCGiO2 sandro@nitrogen"
+  ];
+in {
+
+  nix.trustedUsers = [ "sandro" ];
+
+  programs = {
+    bash.enable = true;
+    tmux.enable = true;
+  };
+
+  users.users.sandro = {
+    isNormalUser = true;
+    extraGroups = [ "users" "wheel" ];
+    openssh.authorizedKeys.keys = keys;
+  };
+
+  users.users.root.openssh.authorizedKeys.keys = keys;
+
+  nix.sshServe.keys = keys;
+}