Firebase Admin SDK - Error: Credential implementation provided to initializeApp() ... failed to fetch a valid Google OAuth2 access token

Question

I initialized the SDK Admin in my code, but when I call an admin function it complains about credentials and tokens. Any idea what this could be caused by?

var serviceAccount = require('../../../path to the actual json file);
admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: 'https://<name of my database>.firebaseio.com'
});

Output

Error fetching user data: Error: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "Error fetching access token: Error while making request: incorrect header check. Error code: Z_DATA_ERROR".
        at FirebaseAppError.FirebaseError [as constructor] (error.js?8304:42)
        at FirebaseAppError.PrefixedFirebaseError [as constructor] (error.js?8304:88)
        at new FirebaseAppError (error.js?8304:122)
        at eval (firebase-app.js?0db4:121)

Christopher Peisert · Answer 1 · 2019-08-15T14:22:15.740

1

The Z_DATA_ERROR suggests that gzip is at fault. Make sure the Firebase Admin SDK has been updated to the latest version.

Also ensure that your computer clock is synchronized.

And finally, check that the Firebase service account and the database URL are for the same project.

edited Aug 15 '19 at 14:22

answered Aug 10 '19 at 12:14

Christopher Peisert

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Hello Sir, i tried syncing the time using the instructions, and I still get these errors. Is it about the chosen location/region of the app when i created it in the firebase console? – Eric Almendral Aug 15 '19 at 05:51
it works using Mirosoft Edge Browser, but not in Chrome, Firefox – Eric Almendral Aug 15 '19 at 10:54
@EricAlmendral See updated note about Z_DATA_ERROR. – Christopher Peisert Aug 15 '19 at 14:22
hello sir, I use the firebase admin sdk with vuejs. is it possible that the cause of the problem is because Im using the sdk on the client? – Eric Almendral Aug 16 '19 at 10:38
1

@EricAlmendral Using the Admin SDK on the client could be causing the problem. **The Admin SDK should only be used in a secure environment and not exposed to clients.** – Christopher Peisert Aug 16 '19 at 11:35
Thank you @ChristopherPeisert, ill try to wrap it in the cloud functions :) – Eric Almendral Aug 16 '19 at 13:03

Firebase Admin SDK - Error: Credential implementation provided to initializeApp() ... failed to fetch a valid Google OAuth2 access token

Output

1 Answers1