Will this work for a custom audience

Was trying to find a way to get phone or email via scraped user id on facebook. Tried entering user id as an email when doing "reset my password" and it actually showed the users profile and asked if i would like to send an email pin message to the user's email associated with the user profile.

My question now is whether we can use the user id, or [email protected] as an email for a custom audience!

Entering [email protected] in your custom audience won't work as Facebook matches the profiles with the email users registered to create the account.

And nobody registered [email protected]

You need their real email adresses