There are a number of ways to connect your console account to your Epic Games account. Select the scenario for your situation and follow the instructions in the articles.
To connect your accounts via the Epic Games Website:
How do I link a console account to my Epic Games account using the web?
To connect your accounts via your console:
How do I link a console account to my Epic Games account using my console?
I’ve only played an Epic game on a console, BUT I don’t know what the email is for my Epic Games account.
Let us know how we can help you.