It seems that the given times are the start times and the end times of the connections to our Shiny apps.
Now I'm wondering how to get the title of the Shiny apps?
Since your code returns the content_guid, you can pass it in the GET/v1/content/{guid} endpoint to return the name and title for the specific piece of content (i.e. your shiny app). RStudio documentation can be found here.
Yes, based on the documentation, it looks like you should be able to do the following (the code uses your content_guid from above). Either content(resp)$name or content(resp)$title should provide the title of your shiny app.