So, I don't have a MyQ door anymore (related word of advice: don't get one, either; use something like a Z-Wave opener you can use entirely locally and on your own terms--you have Hubitat and don't need the opener itself to be extra "smart" since that's what your hub is for). But before I moved, I did try the code and think there was a problem with the quick port I tried--it's been so long I can't remember, but it might have been something with async HTTP calls. Don't quote me on that. 
I know Hubitat has added/changed some things since I tried, so it might be worth looking at again if anyone really needs this...but I can't stress enough that I only used it on ST because I rented and my opener happened to already be compatible.
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