WhatsApp web code can you see it

I have registered on WhatsApp web with code on my mobile phone and laptop. I said the code to my friend accidentally signed me out. You can no longer access my account without a new code, can you?

Yes is shown on your mobile phone when you are active in Whatsapp Web. That's why you would notice it. You can also log out from your mobile phone.

I signed out. Does she still have access now?

So if you have unsubscribed, yes.

But even if she should log in, you will see it on your mobile phone

Yes but don't want that. Can I not delete whatsapp web or what can I do?

No. You can't delete that.

Did she just store the code in her head or somewhere?

I do not know. I have now done a verification on whatsapp. So can whatsapp only use when I enter my password, does it bring anything? Do you have to enter the password if you want to use the web?

Don't believe

I know that you have to scan a QR code when you want to log in to the PC.

I have now logged out on my computer and mobile phone. Does that mean that she is automatically logged out from where she is logged in? I just don't get it.

And on the phone too, right? Since I'm now logged off, she must first theoretically scan it with my cell phone, right? Or can it still be inside even though I have logged out?