Pre-flight check confuses users

[JosiahParry]

Hey folks,

I was working through this example with a customer yesterday and the preflight check caused a lot of confusion for them. I think the HTML print message when it fails is useful when rendered. For someone trying to work through the code, however, it is confusing. Perhaps we can either simplify this, or add it to the readme, that would be helpful.

connect-usage/examples/last_30_days/rsc-usage.Rmd

Line 9 in 6694d7c

```{r preflight_check, results='asis', include=TRUE}