code: def mark_tip_todo(tip_id, options={})
        response = connection.post do |req|
          req.url "tips/#{tip_id}/marktodo", options
        end
        return_error_or_body(response, response.body.response)
      end
docs: Mark a tip todo for the authenticated user.
  
   param [String] tip_id - The id of the tip to mark.