How do you unlock phone that requires Apple ID and give forgotten all information associated with it

Apple ID - How to find your Apple An iCloud e-mail address is an Apple ID.

Apple ID - Find

Enter your Apple (iCloud) ID and click Forgot Password.

Apple ID - Manage

Apple ID – Forgot Password

You would have to take the phone to the company you bought it from and prove that it is yours and not stolen and they should be able to help you unlock it !! As a apple user and owner of iPhone XS Max I would hope there is no easy way to unlock a iPhone without the proper credentials..