Error Code Portal
GoogleFirebase Authentication Admin SDKError code

auth/invalid-credential

invalid credential

What does this code mean?

Code auth/invalid-credential · An issue reported by Firebase Authentication Admin SDK.

Official explanation · Original text

The credential used to authenticate the Admin SDKs cannot be used to perform the desired action. Certain Authentication methods such as createCustomToken() and verifyIdToken() require the SDK to be initialized with a certificate credential as opposed to a refresh token or Application Default credential. See Initialize the SDK for documentation on how to authenticate the Admin SDKs with a certificate credential.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Firebase Admin Authentication API Errors ↗

Creator: Google LLC
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted official error code and description/resolution table; HTML stripped; short code name and original Korean context added. No source-page analytics scripts are redistributed in rendered pages.

Source details · Original licenses and notices