Conversation - Downvote answer
Increments the unhelpful attribute of the answer by 1.
It is your responsibility to restrict users of your website from sending multiple requests for the same answer.
|answer_id||mandatory||id of the conversation answer|
By HTTP status:
- 202 Accepted - action was successful and will be processed asynchronously
- 404 Not Found - conversation answer with given ID does no exist or you are not authorised to access it