Cannot call `getSignedUrl` when using authorized_user default credentials locally

首先跟踪 firebaseAdmin.credential.applicationDefault() 和 Bucket.file().getSignedUrl()，然后将 authorized_user 凭据可用的凭据字段与签名要求进行比较。完成标准是确定是否支持此凭据类型、找出已记录的变通方案，或定义所需的 SDK 更改。

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[REQUIRED] Step 2: Describe your environment

• Operating System version: macOS 11.7.9
• Firebase SDK version: firebase-admin 11.11.0
• Firebase Product: Cloud Storage
• Node.js version: 18
• NPM version: 9.9.0

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

What happened? How can we make the problem occur?
This could be a description, log/console output, etc.

I'm initializing like:

export const admin = firebaseAdmin.initializeApp({
  credential: firebaseAdmin.credential.applicationDefault(),
  ...

but when I do that am unable to call Bucket.file().getSignedUrl() with the error:

Error: Cannot sign data without `client_email`

Looking into my local Firebase credentials, I notice there is no client_email there, but there is when using service accounts. I've found some issues around that seem to say this isn't possible with a personal service account (example).

If that's true, is it not possible at all to use my personal service account to work with files? Or is there a workaround that will enable this to work?