I have an ecobee3 Smart Thermostat, which support HomeKit. I did the HomeKit setup through the app, setup the Keychain iCloud (required) and everything work. I can control the thermostat using Siri. However, I want to allow my family to use the Thermostat with HomeKit. Currently, they cannot do so. Googling this issue point to "adding user" to the device's app, but ecobee3 have no such option. Anyone have the same thermostat and know how to do this? PS: I also have the Philips Hue and plan to upgrade the bridge for HomeKit integration. But if there is no way to add additional user to the HomeKit infrastructure, I may not buy the upgraded bridge.