How to run without leaving old subdomains out

[s3cur3ity]

What's the easiest way to run a new subdomain report each time, irrespective of the last run? I want to be able to see the current results in Slack each time it is run. This is awesome btw. I wrote a similar one using Aquatone, and Qualys and AWS APIs. Didn't have Slack integration and that's how I got here. Thanks!