We need a way to add users to owners of a ladder and to the additional tiers requested in #2. Ideas how this might work:
Add a dialog displaying the user id (number from Google sign in) and a for allowing the owner to add the user. This would require separate messaging to pass the number.
Also display a qr code and allow scanning it, using e.g. html5-qrcode. This allows in-person transfer with mobile.
Change the user id to be based on email (obtainable with the Google sign in). Humans can deal with email, but then we're storing otherwise unwanted personal information.
Add a user-selected username. This is easy to transfer and might be a good idea if we want a reasonable way to remove someone from ACL.
We need a way to add users to owners of a ladder and to the additional tiers requested in #2. Ideas how this might work: