How do I return a list of users if I use the Firebase simple username & password authentication

Question

Not sure if I am doing something wrong but using this api https://www.firebase.com/docs/security/simple-login-email-password.html I can successfully create a user - accordin

Answer 1

You can use Google Identity Toolkit API to get a list of all registered users in your Firebase project, this API is used by the Firebase CLI which can be accessed by running firebase auth:export results-file

Make sure Identity Toolkit API is enabled

firebase-users-list.js

const serviceAccount = require('path/to/firebase-sdk-json-service-account');

const googleapis = require('googleapis');
const identitytoolkit = googleapis.identitytoolkit('v3');

const authClient = new googleapis.auth.JWT(
    serviceAccount.client_email,
    null,
    serviceAccount.private_key,
    ['https://www.googleapis.com/auth/firebase'],
    null
);

authClient.authorize((err) => {
    if (err) {
        return console.error(err);
    }

    let nextPageToken = undefined;
    let users = [];
    const getAccounts = () => identitytoolkit.relyingparty.downloadAccount({
        auth: authClient,
        resource: {
            targetProjectId: serviceAccount.project_id,
            maxResults: 200,
            nextPageToken: nextPageToken
        }
    }, (e, results) => {
        if (e) {
            return console.error(err);
        }

        users = users.concat(results.users);
        if (results.nextPageToken) {
            nextPageToken = results.nextPageToken;
            return getAccounts();
        } else {
            console.log(users);
        }
    });
    getAccounts();
});