how to use pysupercluster with geojson files directly

this is my use case:
i have 6 million of lat/lon rows that i want to display it in a map.
i found [here](https://blog.mapbox.com/clustering-millions-of-points-on-a-map-with-supercluster-272046ec5c97) that i can use **supercluster**  to do that.
because i work with python i choose to do that with pysupercluster but i didn't find how to use it directly in a geojson file converted from a csv.