Multi User Mode

[ben-kaufman]

We could offer in the app a new "multi user mode". This mode will allow the user to securely and privately manage multiple separate users inside the app, completely separate from each other and each with its own PIN, recovery key, and data.

In settings, the user should have the option to select "Multi user mode", which will allow the user to enter a new pin. If the pin for the new user is already used, just leave things as is. Only show error if the new pin is the same as the current pin of the current app session.

If it’s a new one, save it as a new user and generate a new recovery key. When the user is on the login page, the pin they enter will determine the user they enter. If the pin is associated with a user open the app for that user, if unused show an error.