Resolve a Bonusly user group by name, slug, or type and return how many
recipients an actual group post would reach within your company — plus a
paginated roster of those recipients (id and name).

Accepted inputs for group_name:

• "everyone" → the @everyone group (all active receiving users in the
  company)
• A department name (e.g. "Engineering")
• A location name (e.g. "Berlin")
• A team — the manager's name plus "team" (e.g. "Sarah's team") or the
  team slug

Returns recipient_count plus the resolved group_name / group_type /
group_slug, and a members array of {id, name}. Membership is
paginated: members is one page (size limit, default
50, max
200); when more pages
exist next_cursor is non-null — pass it back as cursor to fetch the
next page. Keep the rest of the input (notably group_name) identical
across pages.

Returns an error if no matching group is found, or if more than one
non-reserved group matches the same name (e.g. a department and a
location both named "Sales").

Required OAuth scope: recognition:read or recognition:administer