[OBSOLETE] Honeywell / Ademco Vista 20P Integration

Looks like the end is getting here faster than we had planned (or that I spoke about above):

This just came out today (1/15/2020).

"Hi Everyone,

Many of the features from SmartThings Classic are now included in the new SmartThings app !

We have started asking some users to transition to the new app. However, a few of the features you know and love might not be available quite yet. We will be releasing our transition tool to small groups over the next few weeks. Keep an eye out for the banner in the SmartThings Classic app to get started.

If you have not yet transitioned to a Samsung Account, follow the steps in the banner in the SmartThings Classic app to get started.
Check out our FAQ for more information about the new app."

And this one:

**What happens if I don’t migrate?

You will need to migrate as the Classic app will eventually be deprecated. We will provide an exact date for that in the coming months to give you plenty of advance notice, but if you do not eventually migrate before that date, SmartThings Classic will no longer work and you may lose some of your settings or migration may be more difficult."