Anyone familiar with the Rest API for APA?

I hate to get nerdy on you all, but is anyone familiar with the Rest API for the APA statistics?

The end point is https://api.poolplayers.com. It has swagger docs for the API. I swear there used to be authentication for just a username and password, but now it looks like it wants an API key.

Does anyone know how to get an api key? None of the endpoints for the API show me how to get one.

My end goal was to make a simple we app to display match statistics for my division.