I keep discovering and enjoying the Tedee kit. One thing I miss is a way to send/create access for someone without the need to have a an email. My proposal is to use the Device Code Flow that most of the Apps (ie: Youtube) uses on SmartTV where, by sendind a PIN Code that appear in the device, the owner can give access to the "guest". That will be an easy and secure way to assign key to other people that doesn't belong to the family unit (friends, visitor, temporary employees,...)
for that we plan the keypad. As for the flow you described we have something on a long features-for-the-future list but that will arrive later than the keypad.