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 had the same problem. because Firebase doesn't provide any API to delete bulk users but this is how I have deleted all anonymous users.

Download all the users as json via firebase tool
firebase auth:export users --format=json
https://firebase.google.com/docs/cli/auth#file_format

You can write a firebase cloud function to trigger or write a action method to trigger

import the json file in to your file,

const Users = require('./users.json'); // ES5 

import Users from './users.json'); // ES6 

normally anonymous user doesn't have email so it is easy to delete the record which doesn't have email id

Users.users.map(user => {
    setTimeout(() => {
      admin.auth().deleteUser(user.localId).then(() =>{
        console.log("Successfully deleted user");
      })
      .catch((error) => {
        console.log("Error deleting user:", error);
      });
    }, 20000);
  });

Don't try to reduce the timeout second if you did you may face error.

Error deleting user: { Error: www.googleapis.com network timeout. Please try again.