Picture your first thousand users. This repo generates an image like this: https://twitter.com/ptr/status/1667534133046960128
Warning: Extremely alpha. I was in a hurry. You will have to fiddle with it. There are many ways it can be improved. Send me a PR!
It Need a CSV with rows for each user/day pair, like so:
user_id,event_date,event_count
<unique user id>,<iso date>,<int>
MIT