Flutter Connection State Management - flutter

Question

Hello I am doing my fist App in Flutter and i am just setting up the authentication with FireBase, and a mistake its happenning. Im trying to manage the state and navigate between Home and Login with the streambuilder, and its working fine but only if i do a hot restart on Android Studio after registering a new user. After the hot reload it works fine, i am able to login with any of the existing users and it navigates to the home screen, and when i log out goes back to login screen, but if i create new user than just stops working, the screens do not alterate anymore when i log in with any of the old users...
here its my main
class _MyAppState extends State<MyApp> {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(primaryColor: cPrimary),
home: StreamBuilder(
stream: FirebaseAuth.instance.authStateChanges(),
builder: (context, snapshot) {
if(snapshot.connectionState == ConnectionState.active){
if(snapshot.hasData){
return Home_Screen();
} else if (snapshot.hasError){
return Center(child: Text('${snapshot.error}'),);
}
} else if (snapshot.connectionState == ConnectionState.waiting){
return Center(child: CircularProgressIndicator(color: cPrimary,));
}
return LoginScreen();
}
)
);
}
}
Here is my login and register functions
//Sign Up
Future <void> signUp({
required String email,
required String password,
required String username,
}) async {
try {
if(email.isNotEmpty && password.isNotEmpty && username.isNotEmpty){
UserCredential userCredential = await _auth.createUserWithEmailAndPassword(
email: email,
password: password,
);
//add user to database
await _firestore.collection('users').doc(userCredential.user!.uid).set({
'username' : username,
'email' : email,
'uid' : userCredential.user!.uid,
});
}
} on FirebaseAuthException catch (e) {
if (e.code == 'weak-password') {
print('The password provided is too weak.');
} else if (e.code == 'email-already-in-use') {
print('The account already exists for that email.');
}
} catch (e) {
print(e);
}
}
//Log In
Future <void> logIn({
required String email,
required String password,
}) async {
try {
if(email.isNotEmpty && password.isNotEmpty ){
UserCredential userCredential = await _auth.signInWithEmailAndPassword(
email: email,
password: password,
);}
} on FirebaseAuthException catch (e) {
if (e.code == 'user-not-found') {
print('No user found for that email.');
} else if (e.code == 'wrong-password') {
print('Wrong password provided for that user.');
}
}
}
and here its how i am calling the functions on my screens
ElevatedButton(
onPressed: () async {
setState(() {
_isLoading = true;
});
await AuthService().logIn(
email: _emailController.text,
password: _passwordController.text,);
setState(() {
setState(() {
_isLoading = false;
});
});
},
ElevatedButton(
onPressed: () async {
setState(() {
_isLoading = true;
});
await AuthService().signUp(
email: _emailController.text,
password: _passwordController.text,
username: _usernameController.text,
);
setState(() {
_isLoading = false;
});

Answer 1

After creating the user account, ensure you log in as well.
//Sign Up
Future <void> signUp({
required String email,
required String password,
required String username,
}) async {
try {
if(email.isNotEmpty && password.isNotEmpty && username.isNotEmpty){
UserCredential userCredential = await _auth.createUserWithEmailAndPassword(
email: email,
password: password,
);
//add user to database
await _firestore.collection('users').doc(userCredential.user!.uid).set({
'username' : username,
'email' : email,
'uid' : userCredential.user!.uid,
});
}
// add this
await logIn(email: email, password: password);
} on FirebaseAuthException catch (e) {
if (e.code == 'weak-password') {
print('The password provided is too weak.');
} else if (e.code == 'email-already-in-use') {
print('The account already exists for that email.');
}
} catch (e) {
print(e);
}
}