🐛 [AUTH] 'emailVerified' state change not triggering any streams

[BrutalCoding]

Bug report

Describe the bug
There is an emailVerified property of the currently logged in user that can be accessed by using:
FirebaseAuth.instance.currentUser.emailVerified

I would like to listen to changes to this emailVerified property, so I've tried to listen the following streams:

• FirebaseAuth.instance.userChanges(). Which mentions: "This is a superset of both [authStateChanges] and [idTokenChanges]."
• FirebaseAuth.instance.authStateChanges()
• FirebaseAuth.instance.idTokenChanges()

These streams have been used in conjunction with the StreamBuilder widget.

When the user goes to verify their email by using the verification link that was sent to their inbox, none of these streams get notified of this state change (of emailVerified).

The workaround that I have been applying is setting up a periodic timer that calls FirebaseAuth.instance.currentUser.reload(); every 10 seconds. I went for 10 seconds since that was sufficient enough in my use case. By calling FirebaseAuth.instance.currentUser.reload() periodically, the FirebaseAuth.instance.userChanges() gets triggered soon after (within 10 seconds) the user has verified their email.

Steps to reproduce

Steps to reproduce the behavior:

1. Sign into your app with FirebaseAuth, preferable with an email account so that we can verify the email later.
2. Set up a stream listener to FirebaseAuth.instance.userChanges()
3. Set up a breakpoint or print within the listener to be aware of when the stream gets triggered
4. Change the emailVerified status in Firebase Auth by either using forgot password or email verification link
5. Observe the stream, it should get triggered with new data but it does not.

Expected behavior

The expected behavior would be that FirebaseAuth.instance.userChanges() gets triggered and that the returned value of the stream contains the latest state of the user. The issue here is that the stream does not get triggered at all.

Sample project

No sample project prepared since this requires to be setup with an active Firebase project, I have not done so.

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Additional context

This problem is not unique to Firebase Auth for Flutter, since this issue persists with Firebase Auth for JavaScript as well. A small difference with JavaScript is that their Firebase Auth SDK does not have this a similar (superset) stream:
FirebaseAuth.instance.userChanges()

But it does have the following streams taken from the Firebase Auth for JavaScript docs:

• [onIdTokenChanged] https://firebase.google.com/docs/reference/js/v8/firebase.auth.Auth#onidtokenchanged
• [onAuthStateChanged] https://firebase.google.com/docs/reference/js/v8/firebase.auth.Auth#onauthstatechanged

Both of these streams do not get triggered when the emailVerified of the currently logged in user changes.

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Flutter doctor

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Flutter dependencies

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[BrutalCoding]

I would like to mention that this bug (or lacking feature?) is causing another bug in the flutterfire_ui plugin. Here's an issue of someone facing this bug #8683

[darshankawar]

Thanks for the detailed report @BrutalCoding . I was going through similar issues reported earlier and came across this which seem to be closely related : #3461 for which a fix was made in the documentation #3461. Can you please go through it and see if it helps from above issue's point of view ?

Moreover, this also looks closely related : #6301, #3994 so please check if using user.reload() helps to trigger stream ?

[BrutalCoding]

Thanks for the detailed report @BrutalCoding . I was going through similar issues reported earlier and came across this which seem to be closely related : #3461 for which a fix was made in the documentation #3461. Can you please go through it and see if it helps from above issue's point of view ?

Moreover, this also looks closely related : #6301, #3994 so please check if using user.reload() helps to trigger stream ?

hey @darshankawar, thanks for the quick reply. The method FirebaseAuth.instance.currentUser.reload() does work, thats the workaround that I have described in this issue already. I was hoping to see the stream getting triggered without calling that method periodically.

I've gone through your referenced issues and I see that more people expected to have this stream triggered when emailVerified changes but it seems that the streams are not designed to do so.

The correct and only way to trigger the stream is by calling FirebaseAuth.instance.currentUser.reload() periodically, by doing so, the stream FirebaseAuth.instance.userChanges() will get triggered if emailVerified has changed.

I will close this issue now