Can't log into old account

I had an account here in 2017 that is pretty far in the course but I tried all my emails/github/google accounts and none of them are it.

I know the username and I still see my public profile is there any way I can get my account back?

FCC accounts are linked to the email address associated with the initial login method. So if you created your account with GitHub, for example, you need to login with the email address that your GitHub account used in 2017.