I personally use this to:
Synchronize TRaSH Guides Custom Radarr/Sonarr profiles with my Sonarr/Radarr instance
Send statistics to my discord server
- Current Plex streams
- Changes in TRaSH Guides profile settings
- Sonarr/Radarr recently grabbed releases
- Recently downloaded media
- Upcoming media
Their website is where you will go to login to your account and access your integrations
Their Wiki includes great instructions for app-integration. It is where I learned to setup most of everything I use
Source code for the project, active issues etc.
The video below covers
Keep in mind though, the video doesn't cover Truenas SCALE specific settings though, and not a WHOLE lot of settings will transfer over.