[Okay, that makes a little more sense. Normally he's not so willy-nilly about giving out his door code, but Barnes can keep a secret. It's not like it's that sophisticated a security system anyway; someone with the right skills could bypass it if they really wanted, it's just more security than the communal building has, and that helps him sleep at night.]

351983 opens the door. The thumbprint scanner turns off the 'someone's visiting' alert up in the apartment. Not sure if we have the same fingerprints or not.