Add a New Owner
After launching the thing console and bringing up a list of things, click the thing to which you want to add a new owner.
The thing attribute screen will show up. Click the "Onboard" button to add a new owner.
The following screen will show up.
Specify the new owner by following the steps described in Set an owner.
Then, set a correct thing password and press the "Onboard" button to add the specified owner.