Add a personal user

flake.nix

@@ -33,7 +33,13 @@
               LANGUAGE = defaultLocale;
               LC_MESSAGE = defaultLocale;
             };
-          users = { };
+          users = {
+            manuel = {
+              fullName = "Manuel Thalmann";
+              mail = "m@nuth.ch";
+              sudoer = true;
+            };
+          };
         };
       };