Hi @ThomasP,
I was also hoping that this Groupe PSA cars binding would continue to work. After some research, it appears that Stellantis has introduced breaking changes to their API access.
Several home automation users (over 100) have raised a request on Stellantis’ GitHub repository, where the API and some examples are available:
B2C API access · Issue #128 · Stellantis/stellantis.github.io · GitHub
Unfortunately, there has not been a single response from Stellantis to any of these requests.
It seems that this oh-binding has reached the end of its support. Too bad. 
But let’s hope…