I'm going to guess you just got one from Docker Hub today, because I did too. I saved the code, alongside the password in my password manager, which itself already requires 2FA to open. Still, seems like it defeats some of the point of the security to store it in the same place as the password...
I save mine here: <a href="https://www.arcanus55.com/?trusted55=A55PV2" rel="nofollow">https://www.arcanus55.com/?trusted55=A55PV2</a>