Play hide and seek at Fortnite?

What do I have to enter for this in the creative center?

You have to pick an island code from the internet and enter it in the creative center!

But I'm always alone in it mhh

Oh, that's what you want to know. You can only play hide-and-seek with friends. In creative mode you can't be connected to any people. That's why you're always alone in it!