我试图使Flutter程序包含2 buttomNavigationBar这是adminTabs和userTabs

final userTabs = [
    const RecipeHome(),
    const UserSetting(),
    const CommunityPage(),
  ];

  

    final adminTabs = [
        const RecipeHome(),
        const HomeManagement(),
        const CommunityPage(),
        const UserSetting(),
      ];

  final List<BottomNavigationBarItem> adminNavigationItems = const [
    BottomNavigationBarItem(
      icon: Icon(Icons.home_rounded),
      label: "Home",
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.insert_chart),
      label: "recipe management",
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.group),
      label: "community page",
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.settings),
      label: "User Setting",
    ),
  ];

  final List<BottomNavigationBarItem> userNavigationItems = const [
    BottomNavigationBarItem(
      icon: Icon(Icons.home_rounded),
      label: "Home",
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.group),
      label: "community page",
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.settings),
      label: "User Setting",
    ),
  ];

我尝试将其连接到firebase，如果users集合中的类型为'1'，则它将返回adminTabs和adminNavigationItems。

void _getUserType() {
    // Get the current user from Firebase Authentication
    FirebaseAuth.instance.authStateChanges().listen((user) {
      if (user != null) {
        FirebaseFirestore.instance
            .collection('users').doc(user.uid).get().then((doc) {
          if (doc.exists) {
            String userType = doc.get('type');
            print('User type: $userType');
            if (userType == '1') {
              setState(() {
                _isAdmin = true;
              });
            }
          }
        });
      }
    });
  }

但我似乎只给了userTabs，因为我设置了bool _isAdmin = false; .它似乎不fetth从firebase的任何数据，只使用变量.我怎么能修复它？