Fortnite account sign back in to Xbox?

I got a Fortnite account as a gift. Of course, I registered immediately because I thought that cool skins were on the account. When I found that there were no skins on it, I wanted to log in to my old account again but it was clear that I had to confirm the email address but the account was given, I had no password for the email address only for Epic Games. What should I do? I want to log in with my old account.

Write to the person who gave you the acc and ask if they can send you the confirmation

Hope this helps you