[lcmatt]

The password is the one you tell them on initial setup of the account, they'll ask you for a memorable word to verify that it's the account holder they're talking to.

This isn't anything to do with account logins etc. No different than companies asking you to verify your DOB and address to prove who you are.

[MattBearman]

Memorable word! That's the term I was trying to think of, thank you! If they called it that in the tweets this whole thing probably could have been avoided.