Need help retrieving my account/server

So idk how but i logged out of aternos but cant seem to log in anymore. My username was RUBENKOK3 but when i press "forgot password" and fill my username in it says that he couldnt find my username. When i try to create a new account with RUBENKOK3 as username it says that my username is already taken. I tried all my emails but couldnt fine one with RUBENKOK3 as username.

So Did my account exist or did i screw something up?

Thanks in advance.