Cannot access my account

My main account is this: https://www.imdb.com/user/p.lanxhrpheh6dugxsy5ghkiu6ne

I was using google login to login this account. Nothing suspicious or mails saying password change requested whatsoever. Today, after I cleared my cookies, when I try to login my account, it gives me "This email is found nowhere on IMDB". I need help to recover it. There are so many things in there I like to have back