Firebase - how to limit the login to one?

DevOps Firebase
1

I’ve used firebase for a website , how to limit the login to 1 or delete the user after 1 login

2

You can just usenonymous login…and disable persistence I guess

3

I dont see point…but its doable

4

How to restrict innonymous login

5

There is nothing to restrictt that scenario…if you trygain, you will get new user

6

Im making votingpp where user logins to votes soons vote is counted the user logs out , but if he loginsgain he can vote.i want to restrict that.

7

You need to sort out your mind first…its either voting / registering & login…if you wanted to delete userfter first login / vote…he would beble to votegain, no ?! …

So first you need to sort identification &uthentication = register / login

AND THEN business rule, ie vote only once

8

There is no registration , I provide email id/password.I have to make it one time use. I used same button for votingnd logging out

9

Why do they need to provide password, if they cant logingain ?

10

Why do youctually have to createccount…

11

You can just make entry with emailddressnd check if it haslready voted