Fortnite logged in automatically? Creator code?

Hi, when I want to register in fortnite I will always be logged on to my 2 acc and can't on my main acc how can I set that it does not connect automatically

Go to the settings and log out of Fortnite. If you then log in again with your account, there should be a box with the word "stay logged in" next to it or if you do not select the box, you should be able to log in again each time. Otherwise just always log out and log in again with the correct acc