For those who trust me: Goto your Amazon account, sign out of all your devices, everything, everywhere all your Echos (yes I know it's a pain), reset your password, delete 2FA and any tokens and reset them. Now. That doesn't include Fido / Yubikeys but does include Auth tokens. Do it now. As much a pain as it is to reset Echo and all smart devices, trust me, please do it. I can't tell you more yet, but I am being ethical and you need to actually realise I have a clue. It's been a scary day