How to bulk delete Firebase anonymous users

Question

Due to my probable misuse of anonymous authentication (see How to prevent Firebase anonymous user token from expiring) I have a lot of anonymous users in my app that I don\'

Answer 1

I faced the same problem today then I found Firebase Admin SDK. I am using Node.js which is very easy to install, so you can try the following code. It is not a complete answer I know but one can build its own script/application to delete stored uids. Yet, there is no way to retrieve a list, so you have to build one somehow every time you create an anonymous account.

First, download your 'serviceAccountKey.json' which can be done through the Firebase Console (Project Settings). In my case I renamed the download file to a more friendly name and saved to documents folder.

console.firebase.google.com/project/yourprojectname/settings/serviceaccounts/adminsdk

Useful links:

• Firebase Admin SDK Setup
• Firebase Admin User Management
• Firebase Admin Database API

Then, play around using Windows cmd.exe or any other shell. The 'npm install -g' installs firebase-admin globally in your machine.

$ npm install firebase-admin -g
$ node
> var admin = require("firebase-admin");
> admin.initializeApp({
  credential: admin.credential.cert("./documents/yourprojectname-firebase-admin.json"),
  databaseURL: "https://yourprojectname.firebaseio.com"
});
> var db = admin.database();
// Of course use an existent UID of your choice
> admin.auth().getUser('2w8XEVe7qZaFn2ywc5MnlPdHN90s').then((user) => console.log
(user))
> admin.auth().deleteUser('2w8XEVe7qZaFn2ywc5MnlPdHN90s').then(function() {
    console.log("Successfully deleted user");
  }).catch(function(error) {
    console.log("Error deleting user:", error);
  });

// To get access to some key/values in your Database:
> var ref = db.ref("users/1234");
> ref.once("value", function(snapshot) {
  console.log(snapshot.val());
});