Rename bitly_link_lookup() to bitly_link_lookup_all_variants() so that it's clear that the subroutine does some additional stuff instead of just calling /v3/link/lookup
Add a more generic bitly_link_lookup() subroutine; make bitly_link_lookup_all_variants() use it
Comment out overly verbose "say"
Add bitly_link_clicks() helper which would collect link clicks data