[2022] Fall Guys Epic Account on Switch

I created an new Epic Account (Name Ultimatix89) just for Fall Guys to get the Pre Registration Bonus. When i started the game i was automatically logged in as "Ultima2323". And i knew why, because i played Rocket League ages ago on my Switch, which has the same Account Name. But i don't know if i had created an Epic Games Account for this. How can i log out in Fall Guys of my Account on my Switch to login with my new created Epic Account? In the Options there is only "Link Account to Amazon".