Fortnite, help away account?

It's about account merging into fortnite. The main and the second account. When the second account transfers the items on the main account. Will the second account be yes. Be disabled. You can't login to the account anymore: Then there's: Your account is currently inactive.
Does one know if the second account is logged in again after 14 days?
After he has been transferred. Because I currently have no access to my second account.

The acc you transfer is deactivated and after 14 days the items are transferred and the acc disappears so he is connected to your main account

Understand but what happens then with the LOGIN data of the second account? Can one then only with the main acc. Log in?

Nothing happens with the main acc but the 2nd acc disappears, that means it does not exist anymore or it is completely reset. So one of the two possibilities can happen