How can I log in to my fortnite account on an Xbox

She was the first to log into fortnite on the xbox. When i tried to log my epic account on it from my profile, it just brings up her fortnite account even if im on my profile. We share one xbox with 2 different microsoft accounts and we share the gold
for multiplaying. The only way to log her out is to unlink it from the epic games website. I can play everything else independently, but so far have been unsuccessful on having two fortnite accounts on one xbox, even on two different accounts. I know how the
sharing works, This is Fortnite specific on ONE console.

Have you added her to your family account? You can do that and make your console you Home Console. This will allow them to share your Live Gold.

https://support.xbox.com/en-US/xbox-one/security/add-family-member-on-xbox-one

That's how I have mine setup and the kids can access multiplayer just fine for Fortnite

Hope that helps

Are they sharing one xbox? We have both accounts logged on one console and we have the family thing set up. I can play other multiplayer games online, but it will not allow me to log into fortnite. Even with her signed out of xbl and my account logged in,
it brings up her fortnite account already logged in. We cant log hers out without unlinking.

How can I login my Fortnite account on Nintendo and transfer it to my Xbox account?

But normally including Fortnite it is not necessary. Normally for all other playing must be console started with my account, then my children can switch to their account and everything is OK. I have the only problem with this split screnn feature, that is
why I am trying to understand, if I can use the splitscreen somehow without making the console the home Xbox.

Generally I found the only way how to run Fortnite splitscreen on my console:

1. returned back my home Xbox to my console

2. start Fortnite under occount of one child

3. inside game first log out other players and then log in second child - only in this case possibility to add 2nd player become active.

Since I can't sign in how can I play Fortnite? It won't let me log in so that means my xbox one is useless?