flutter Ignoring header X-Firebase-Locale because its value was null

Question

I linked my app with firebase but when I try to signup with a new user in the app I am getting this error: Ignoring header X-Firebase-Locale because its value was null. that is the auth screen code:

class Authscreen extends StatefulWidget {
  @override
  Authscreenstate createState() => Authscreenstate();
}

final auth = FirebaseAuth.instance;

class Authscreenstate extends State<Authscreen> {
  void submitauthform(String email, String password, String username,
      bool islogin, BuildContext ctx) async {
    UserCredential authres;
    try {
      if (islogin == true) {
        authres = await auth.signInWithEmailAndPassword(
            email: email, password: password);
      } else {
        authres = await auth.createUserWithEmailAndPassword(
            email: email, password: password);
      }
    } on FirebaseAuthException catch (e) {
      String message = "error";
      if (e.code == 'weak-password') {
        message = 'The password provided is too weak.';
      } else if (e.code == 'email-already-in-use') {
        message = 'The account already exists for that email.';
      } else if (e.code == 'user-not-found') {
        message = 'No user found for this email.';
      } else if (e.code == 'wrong-password') {
        message = 'Wrong user privded for that user';
      }
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(message),
          backgroundColor: Theme.of(ctx).errorColor,
        ),
      );
    } catch (e) {
      print(e);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Theme.of(context).accentColor,
      body: Authform(submitauthform),
    );
  }
}

Answer 1

My Solution

For clarification, the code is a system warning, not an error hence should not affect the system's processes.

W/System  (25234): Ignoring header X-Firebase-Locale because its value was null.

From the above code, you have limited the program to utilize only a few firebase authentication errors.

  try {
       ...
    } on FirebaseAuthException catch (e) {
      ...
      if (e.code == 'weak-password') {
        ...
      } else if (e.code == 'email-already-in-use') {
        ...
      } else if (e.code == 'user-not-found') {
        ...
      } else if (e.code == 'wrong-password') {
        ...
      }
      ...
    } catch (e) {
      print(e);
    }

That's good for user experience but what about other FirebaseAuthException? How will you know? (This is the problem one will face).

Hence, in order to get all the firebase exceptions and know what's happening use print(e.code) within the FirebaseAuthException catch.

Example:

  try {
       ...
    } on FirebaseAuthException catch (e) {
      ...
      if (e.code == 'weak-password') {
        ...
      } else if (e.code == 'email-already-in-use') {
        ...
      } else if (e.code == 'user-not-found') {
        ...
      } else if (e.code == 'wrong-password') {
        ...
      }
      ...
      print(e.code) //Add this line to see other firebase exceptions.
    } catch (e) {
      print(e);
    }

This should help you to know where you are stuck.

Any misconceptions about my code and bugs, don't hesitate to comment. I will reply as soon as possible.