Update: as I noted on my blog, the #HumanInterest web site won't let me set up 2-factor authentication. I just heard from their support team that this is because I linked my existing login to my new 401k account (_which their site told me to do_) and their 2FA implementation doesn't know how to deal with that. They gave me a workaround to try, which of course didn't work. I've told them that, and I'm eagerly awaiting the next chapter in the story of their incompetence.
#HumanInterest