I'm trying to get the number of unique users and graph it on DataDog.
I'm using a set and recording a user interaction by using their email:
statsd.set("unique_users", <email>)
I'd like to get the number of "keys" in the set for each day. That is, I'd like to get the number of unique users per day.
I have tried a bunch of combinations, but there doesn't seem to be a way to count the number of keys in a set.