List the objection ranking for a campaign
Authentication
Path parameters
UUID of the campaign. A non-UUID is a 400; an unknown id returns an empty list.
Query parameters
Look-back window in days. Never rejected - a non-integer, out-of-range (1-365) or non-numeric value falls back to 30.
Maximum objections to return. Never rejected - a non-integer, out-of-range (1-50) or non-numeric value falls back to 10.

