This data was out since late 2021. One of the guys who found the vulnerability way back had some disagreements with the other team members and in retaliation made the bot.
What's funny is this hack was done with the intention of finding vulnerabilities and reporting them to cowin team to patch and get some recognition for themselves. But on one side the guys doing were pretty young and found more fun in using this to play pranks on their friends and on the other hand cowin had usual Indian response to a security breach information, which was to ignore it mostly.