Number of emails sent

I have a number of reports in production. Some of these I expect users to log into. Others, trigger email (some daily, some weekly, a few monthly). Every quarter, I would like to be able to report to our stakeholders how many engagements we had with RSC (I'm justifying the license cost here).

  • I know how to find SHINY sessions.
  • I know how to find engagements with static reports.
  • I cannot figure out how to count emails sent.

I've been starting at this: RStudio Connect API Reference which has answered most of my questions but unless I am daft, I can't figure out how to count how many emails were sent in a given time frame.