Past employee tax forms

Hey so I know about going through day force and the password being your first name and last 3 of social but how do you get your user name/ID if you don’t remember it.Weird they’ve already sent me a 1095-C insurance form when I didn’t take the insurance through them before the actual W2.Also I hated that job so much man I was at a commercial store and having so many trucks a week and micro managing assistant managers pissed me off I wanted to fight that guy.