curl --request GET \
  --url https://api.givebutter.com/v1/campaigns/{campaign}/discount-codes/{discountCode} \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "campaign_id": "<string>",
  "code": "<string>",
  "type": "<string>",
  "amount": 123,
  "used": "<string>",
  "uses": "<string>",
  "active": "<string>",
  "total_discount": "<string>",
  "starts_at": "<string>",
  "expires_at": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "items": "<string>",
  "all_items": "<string>"
}