V3 API documentation?

Hi,

I am currently learning Romanian and trying to contribute to LingQ by adding content I find online. I’ve managed to reverse engineer some of the API endpoints but man is that tedious.

Could someone at LingQ please send over up-to-date API documentation for v3?

In case it helps, this gives me my key statistic on a language.
I think someone discussed it with me before, so search this forum.

https://www.lingq.com/api/v3/fr/progress/chart_data/?metric=reading&period=today