https://github.com/jorhett/hubitat-abode/wiki/Changing-Hubitat-Mode-when-Abode-is-armed
https://github.com/jorhett/hubitat-abode/wiki/Creating-Triggers-from-Abode-events
https://github.com/jorhett/hubitat-abode#known-limitations
The Abode API is only available through their Cloud service. There is no way to communicate directly with the local unit (they have said, and nobody else has found otherwise)
The reverse engineered API is a known thing they don't officially support, but unofficially are "aware of" and have pointed people to.