get all user from firebase auth code example
Example 1: firebase auth get current user
var user = firebase.auth().currentUser;var name, email, photoUrl, uid, emailVerified;if (user != null) { name = user.displayName; email = user.email; photoUrl = user.photoURL; emailVerified = user.emailVerified; uid = user.uid;
Example 2: firebase get all users
If you need to lookup users by uid, email or phoneNumber, you can use the Admin SDK to do so:
https://firebase.google.com/docs/auth/admin/manage-users
You also even have the ability to download all your users: https://firebase.google.com/docs/auth/admin/manage-users#list_all_users
You would need to do that from a Node.js backend server or via HTTP endpoints with Firebase Functions.
In addition the Admin SDK allows you to set custom user attributes which could be helpful if you want to create different user groups:
https://firebase.google.com/docs/auth/admin/custom-claims
admin.auth().setCustomUserClaims(uid, {groupId: '1234'})