FR: Specify why auth/missing-identifier is being returned

[silverAndroid]

[REQUIRED] Describe your environment

• Operating System version: macOS 12.3
• Browser version: Firefox 111.0.1
• Node version: 16.17.0
• Firebase SDK version: 9.19.1
• Firebase Product: auth

[REQUIRED] Describe the problem

I recently ran into an issue where auth/missing-identifier was being returned with no details anywhere on why this error was being returned. I learned later it was because I was passing a token that wasn't created through the Firebase Admin SDK but it wasn't clear when all I had to go on was Firebase: Error (auth/missing-identifier). and there wasn't any explanation anywhere in https://firebase.google.com/docs.

Steps to reproduce:

To reproduce the issue, just call signInWithCustomToken with a valid JWT token that wasn't generated through Firebase Admin.

Relevant Code:

// jwtToken is a JWT token that wasn't generated through Firebase Admin
await signInWithCustomToken(auth, jwtToken);

[kohinoor98]

@silverAndroid facing the same issue on similar env, were you able to resolve this?

[prameshj]

That error seems to be thrown if the custom token did not have a "uid" associated with it? Can you open a Firebase support case with details of what the custom token looked like?

[google-oss-bot]

Hey @silverAndroid. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[silverAndroid]

@prameshj this was a while back. I'll try and see if I can repro the issue and open a support case if I remember where in my git tree I had this issue

[matiheilen2]

I'm facing a similar issue right now, i am also getting the error

Uncaught (in promise) FirebaseError: Firebase: Error (auth/missing-identifier).

Do any of you know how to fix this firebase - Facebook auth issue? It seems like firebase is having some trouble authenticating both facebook and other providers. Or maybe I just initialized things incorrectly, but I can't seem to find any solutions over the internet and the documentation for the error doesn't seem to exist.

Any help would be really nice