Are anonymous logins possible this way?

Basically the idea is to get rid of emails and use these steps instead.

1. Server generates a lengthy code (maybe a uuid) (used as a username), and a lengthy secret (used as a password) and a qr code that if you scan will setup a TOTP for you (used as extra auth) (google authenticator stuff)

does this make sense? is it secure for like a temporary login system that doesn't breach privacy or something?