How do i get back an old fortnite account that i can sell for alot?

[Orbital1]

I have or had an fortnite account that i have alot of skins basically all battlepass skins and quite alot rare old items. I have not logged into it for well over 1 and half years maybe even 2 years or more and i dont remember the password and all the details about it. Also i forgot the password to the gmail i belive i made it with might be another but i am pretty sure it is that one i think it is. But when i tried to recover it said that they couldnt find the account.
Dude i can sell this account for realistically 2k+ which is alot.

What should i do even??

 

[Orbital1]

Bump

 

[Orbital1]

Bump

 

[Prøphet]

Bro you just reminded me I have an account from like 8 years ago but I completely lost the username and password, 10 year old me had like 100 skins on that mf I could be rich if I remembered