Display error message instead of throw exception in console (Flutter Firebase) - firebase

Question

How to show the error message when the user enters the incorrect username and password? Can I display a message when there are multiple conditions in authenticating the user? The message should show on the screen instead of throwing the exception in the console.
The exception I get in the console
The exception has occurred.
PlatformException (PlatformException(firebase_auth, com.google.firebase.auth.FirebaseAuthInvalidUserException: There is no user record corresponding to this identifier. The user may have been deleted., {code: user-not-found, additionalData: {}, message: There is no user record corresponding to this identifier. The user may have been deleted.}, null))
import 'package:firebase_auth/firebase_auth.dart';
abstract class BaseAuth {
Future<String> currentUser();
Future<String> signIn(String email, String password);
Future<String> createUser(String email, String password);
Future<void> signOut();
}
class Auth implements BaseAuth {
final FirebaseAuth _firebaseAuth = FirebaseAuth.instance;
Future<String> signIn(String email, String password) async {
UserCredential result = await FirebaseAuth.instance
.signInWithEmailAndPassword(email: email, password: password);
User user = result.user;
return user.uid;
}
Future<String> createUser(String email, String password) async {
UserCredential result = await FirebaseAuth.instance
.createUserWithEmailAndPassword(email: email, password: password);
User user = result.user;
return user.uid;
}
Future<String> currentUser() async {
User user = _firebaseAuth.currentUser;
return user != null ? user.uid : null;
}
Future<void> signOut() async {
return _firebaseAuth.signOut();
}
}

Answer 1

A simple try catch would do the trick
Future<String> signIn(String email, String password) async {
try{
UserCredential result = await FirebaseAuth.instance
.signInWithEmailAndPassword(email: email, password: password);
User user = result.user;
return user.uid;
}on AuthException catch(error){
return Future.error(error);
}
}
Now on how to handle the error in the UI assuming you know the basics :D
await signIn(email,password).then((onSuccess){
//do something with data or not up to you
}).catchError((err){
print(err);
});
Hope it helps :)