Firebase Authenticationのユーザー一括削除 (`tsc`でビルドした後に`node GENERATED_JS.js`で実行)

firebase_autheintication_delete_all.ts

import * as admin from 'firebase-admin';

admin.initializeApp({
  credential: admin.credential.cert(__dirname + 'YOUR_KEY_RELATIVE_PATH'),
  databaseURL: 'https://YOUR_PROJECT_ID.firebaseio.com',
});

const sleep = (msec: number) => new Promise(resolve => setTimeout(resolve, msec));

(async () => {
  const users = await admin.auth().listUsers();
  for (const user of users.users) {
    console.log(user.uid);
    await admin.auth().deleteUser(user.uid);
    await sleep(50); // 速すぎると`QUOTA_EXCEEDED`になるので適当に間隔を開ける
  }
})();