fix

lib/material/router.dart

@@ -1,16 +1,32 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:momo/material/home.dart';
+import 'package:momo/material/login.dart';
 
 class MyMaterialRouterConfig {
-  static GoRouter router = GoRouter(
-    routes: <RouteBase>[
-      GoRoute(
-        path: '/',
-        builder: (BuildContext context, GoRouterState state) {
-          return HomePage();
-        },
-      ),
-    ],
-  );
+  late GoRouter router;
+
+  MyMaterialRouterConfig(String? token) {
+    router = GoRouter(
+      routes: <RouteBase>[
+        GoRoute(
+            path: '/',
+            builder: (BuildContext context, GoRouterState state) {
+              return const HomePage();
+            },
+            redirect: (BuildContext context, GoRouterState state) {
+              if (token == null || token.isEmpty) {
+                return '/login';
+              }
+              return null;
+            }),
+        GoRoute(
+          path: "/login",
+          builder: (BuildContext context, GoRouterState state) {
+            return const LoginPage();
+          },
+        )
+      ],
+    );
+  }
 }