Badge request: Particle Library installs

Goal is to add an installs badge to display the number of downloads/installs for particle.io libraries. The API endpoint is here and requires authentication via a personal access-token.

I'd like to take a stab at it but am not sure how to really integrate/require credentials. I think there is a tutorial somewhere, or I'll dive into the source on one of the other badges that requires them. Any help/input would be appreciated!