def classification_leaderboard(campaign_id)
      response = connection.get do |req|
        req.url "campaigns/#{campaign_id}/classification_leaderboard"
      end
      return_error_or_body(response)
    end
def classification_leaderboard(campaign_id)
      response = connection.get do |req|
        req.url "campaigns/#{campaign_id}/classification_leaderboard"
      end
      return_error_or_body(response)
    end
Get the classification leaderboard for a given campaign

 param [Integer] campaign_id The ID of the campaign to fetch the leaderboard for.