Flutter stream's snapshot has no data - flutter

Question

I'm trying to make a flutter mobile app with my own back end using Django rest framework, and JWT
My flow is, after signing in i will store access token in local storage, and create a stream to update the widget (like FirebaseAuth.instance.authStateChanges()). It's working fine but after i switching screen, my stream has NO DATA, and it show login screen
Below is my creation of that stream (token_services.dart), while localStorage is from localstorage package
StreamController<String> accessTokenStreamController =
StreamController<String>.broadcast();
Stream<String> get accessTokenStream => accessTokenStreamController.stream;
void setAccessToken(String accessToken) {
localStorage.setItem('access_token', accessToken);
accessTokenStreamController.add(accessToken);
}
String getAccessToken() {
return localStorage.getItem('access_token');
}
Here is my screen (account_screen.dart):
class AccountScreen extends StatefulWidget {
#override
_AccountScreenState createState() => _AccountScreenState();
}
class _AccountScreenState extends State<AccountScreen> {
#override
Widget build(BuildContext context) {
return StreamBuilder(
stream: accessTokenStream,
builder: (context, snapshot) {
if (snapshot.hasData && snapshot.data != null)
return AuthorizedScreen();
else
return UnauthorizedScreen();
});
}
}
And the root screen:
class Wrapper extends StatefulWidget {
#override
_WrapperState createState() => _WrapperState();
}
class _WrapperState extends State<Wrapper> {
int status = 0;
List<Map> screens = [
{'name': 'Home', 'widget': HomeScreen(), 'icon': Icon(Icons.home)},
{
'name': 'Account',
'widget': AccountScreen(),
'icon': Icon(Icons.account_circle)
},
];
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(child: screens[status]['widget']),
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
currentIndex: status,
items: screens
.map((scr) =>
BottomNavigationBarItem(label: scr['name'], icon: scr['icon']))
.toList(),
onTap: (value) {
setState(() {
status = value;
});
},
),
);
}
}
Note that if i provide initialData to StreamBuilder, it's completely fine