If TRUE, and a rate limit is exhausted, will wait
until it refreshes. Most Twitter rate limits refresh every 15 minutes.
If FALSE, and the rate limit is exceeded, the function will terminate
early with a warning; you'll still get back all results received up to
that point. The default value, NULL, consults the option
rtweet.retryonratelimit so that you can globally set it to TRUE,
if desired.
If you expect a query to take hours or days to perform, you should not
rely solely on retryonratelimit because it does not handle other common
failure modes like temporarily losing your internet connection.