A Slack bot that queries a Google Sheet for remaining PTO

People kept bugging the ops director at my company to check a spreadsheet for how much PTO time they have left. I automated it for fun and to get better with API's and Node. I deployed it on Google Cloud App Engine.

I ran into a known bug which uses a deprecated setting as a solution. However, the solution has been removed from their cloud library. I found the updated one and corrected the thread here: GoogleCloudPlatform/getting-started-java#281 (comment)