undefined null?
**Describe the bug**
Not really a bug just a quick question

**Expected behaviour**
I use http-switch to control my Enigma2 based satellite box as channels can be changed by http calls. I expose the item as a device in Alexa so I can say "Alexa turn on BBC One".

I notice that I always get the in the Homebridge log `undefined null `just interested what the `undefined null` means.
[10/6/2020, 08:24:29] [Alexa] PowerController TurnOff 0E:7D:D3:49:10:DE undefined null
[10/6/2020, 08:24:34] [Alexa] PowerController TurnOn 0E:7D:D3:49:10:DE undefined null


