Minor 13.6.1 => 13.7.0 update breaks nitropack dev bundler

[felixh10r]

[READ] Step 1: Are you in the right place?

• For issues related to the code in this repository file a Github issue.
• If the issue pertains to Cloud Firestore, read the instructions in the "Firestore issue"
  template.
• For general technical questions, post a question on StackOverflow
  with the firebase tag.
• For general Firebase discussion, use the firebase-talk
  google group.
• For help troubleshooting your application that does not fall under one
  of the above categories, reach out to the personalized
  Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Operating System version: MacOS 26
• Firebase SDK version: 13.7.0
• Firebase Product: auth
• Node.js version: 25
• NPM version: 11.11.0

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

Create a new nitro project.
Add firebase-admin 13.7.0
Start the bundler via nitro dev
Call any auth function that requires an access token

Error message:

FirebaseAppError: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "The "listener" argument must be of type function. Received an instance of Object".

The problem does not occur in production. It is resolved when downgrading to version 13.6.1.
It seems that google-auth-library 9.15.1 => 10.6.1 introduced the issue, but I'm not experienced enough with the codebase to dig deeper.

Relevant Code:

import { getAuth } from "firebase-admin/auth";

const { uid } = await getAuth().createUser({
  email: body.email,
});