Don't you have to be already logged in to access your profile and set this toggle? For me, at least for now, I can't log in because Amtrak's system won't send my email a verification code for authentication.I am a bit puzzled by this since it looks like I can at will either turn on two factor authentication or turn it off by toggling the "Enable/Disable" toggle in my profile. Does that not work for everyone? It appears to work in all the browsers I use (Firefox, Safari, Chrome). Very puzzling.