Configure Firebase Authentication to send INVALID_CREDENTIALS instead of EMAIL_NOT_FOUND or INVALID_PASSWORD

Question

I'm using free Firebase plan for testing my React apps and I'm working on authentication with email and password provider right now.

I'm using Firebase straight in my client.

I managed to handle authentication errors in UI and show users a message like Invalid credentials if either their email or password is wrong but I still get EMAIL_NOT_FOUND or INVALID_PASSWORD response from firebase in the network tab.

This is how I'm handling the UI

try {
  setFirebaseError("");
  await signInWithEmailAndPassword(auth, values.email, values.password);
} catch (err) {
  if (["auth/wrong-password", "auth/user-not-found"].includes(err.code)) setFirebaseError("Invalid credentials");
  else setFirebaseError(err.message);
}

But the response is either

{
  "error": {
    "code": 400,
    "message": "EMAIL_NOT_FOUND",
    "errors": [
      {
        "message": "EMAIL_NOT_FOUND",
        "domain": "global",
        "reason": "invalid"
      }
    ]
  }
}

or

{
  "error": {
    "code": 400,
    "message": "INVALID_PASSWORD",
    "errors": [
      {
        "message": "INVALID_PASSWORD",
        "domain": "global",
        "reason": "invalid"
      }
    ]
  }
}

and I don't want that.

Is there a way to configure Firebase Authenticaton to send custom error response?

Answer 1

Yes, you can do it

try {
  await FirebaseAuth.instance.signInWithEmailAndPassword(
  email: "your_given_email",
  password: "your_given_password!"
);
} on FirebaseAuthException catch (e) {
            if (e.code == 'network-request-failed') {
              showErrorDialog(context, 'No Internet Connection');
              //devtools.log('No Internet Connection');
            } else if (e.code == "wrong-password") {
              return showErrorDialog(
                  context, 'Please Enter correct password');
              //devtools.log('Please Enter correct password');
              //print('Please Enter correct password');
            } else if (e.code == 'user-not-found') {
              showErrorDialog(context, 'Email not found');
              // print('Email not found');
            }  else if (e.code == 'too-many-requests') {
              return showErrorDialog(
                  context, 'Too many attempts please try later');
              //print('Too many attempts please try later');
            } else if (e.code == 'unknwon') {
              showErrorDialog(
                  context, 'Email and password field are required');
              //print('Email and password field are required');
            } else if (e.code == 'unknown') {
              showErrorDialog(
                  context, 'Email and Password Fields are required');
              //print(e.code);
            } else {
              print(e.code);
            }
          }