I’m in the same boat. Ecobee’s developer feature is broken (I already have a developer account, but the “Create App” feature isn’t working). One of my four thermostats was discovered as a Homekit device. 
I’m in the same boat. Ecobee’s developer feature is broken (I already have a developer account, but the “Create App” feature isn’t working). One of my four thermostats was discovered as a Homekit device.