A feature I'd really like to see on a password protected account or a sharing app would be a second password that works only after n days of no logins. So I ca

A feature I'd really like to see on a password protected account or a sharing app would be a second password that works only after n days of no logins. So I can give my wife a login for my email and I know she can't use it unless I'm incapacitated. And I can choose how many days of inactivity would qualify for the dead-man's login.