I have opened a few issues in your repo, I want to try this out but there's very little documentation. I know I can probably just `pio build -t upload`, but I'm not sure about the schematics.
In general you can try the project with ESP32 development board and upload the firmware using `pio run -t upload -t monitor`
Then you need to pair the Bluetooth device. Afterwards you should be able to see connection requests in the serial monitor when you start authentication.
The actual authentication commands are not implemented yet, so it will not go further. Sorry :(