You'll be rate limited at an average 10 requests per second across the cluster. Redis was not harmed during the making of this project.
Try sending some requests:
wrk -c2 -d60 -t2 "https://www.elixirphoenixratelimiter.com/?session_id=8ccdeb28-feaa-4b3f-9afd-8cc27a174daf"