I’m a bit confused with the accounts that I’ve had to create just to reach this forum.
 There is one account to associate my physical devices (hub, switches, sensors, …) with the SmartThings app on my mobile phone.
 There is another account to get into the [Build SmartThings] site.
 There is yet another account to access the developer tools.
What exactly ties them all together? Is it the email address? I happen to use different email addresses for  and for [2, 3]. Should I go back to square one and recreate accounts for [2, 3] using the same email address for ?
Under “Developer Tools”, there are “My Hubs”, “My Devices”, etc. I’m guessing these are for creating virtual devices for testing. Is this correct? Or are they also for importing physical devices into the IDE for programming? In order to create one of these things, I have to enter "Zigbee Id’ or “Device Network Id”. Where do I get these IDs?