[FR] I'd like to be able to enable and disable TOTP MFA from Java code

I want to be able to quickly configure firebase instances (specifically MFA) from my java code.

For this to happen I need a way to:

- Get a gcloud token (The only way I've found to this is by downloading the gcloud-cli, all other methods somehow lead to invalid tokens) using java code and the firebase service account file
- Make the configuration (This could be done using an HTTP-Command but I feel like it should be part of the admin-sdk)

Currently I'm using the gcloud-cli. This won't be an option on the server since it needs a browser to login

Apperently this is actually possible in the node sdk using only the service account file, according to the doc:

https://firebase.google.com/docs/auth/web/totp-mfa

I haven't tested it though.

首先，將要求的 Java Admin SDK 能力與連結的 TOTP MFA 文件以及現有的 gcloud-cli 工作流程進行比較。檢查如何使用服務帳戶檔案取得 token，以及如何透過 HTTP 命令或 SDK API 暴露設定。完成標準是在不使用以瀏覽器為基礎的 gcloud 驗證的情況下，能夠從 Java 啟用和停用 TOTP MFA。

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