code: def add_permission(self, topic, label, account_ids, actions):
          
          params = {'ContentType' : 'JSON',
                    'TopicArn' : topic,
                    'Label' : label}
          self.build_list_params(params, account_ids, 'AWSAccountId')
          self.build_list_params(params, actions, 'ActionName')
          response = self.make_request('AddPermission', params, '/', 'GET')
          body = response.read()
          if response.status == 200:
              return json.loads(body)
          else:
              boto.log.error('%s %s' % (response.status, response.reason))
              boto.log.error('%s' % body)
              raise self.ResponseError(response.status, response.reason, body)
docs: Adds a statement to a topic's access control policy, granting
          access for the specified AWS accounts to the specified actions.
  
          :type topic: string
          :param topic: The ARN of the topic.
  
          :type label: string
          :param label: A unique identifier for the new policy statement.
  
          :type account_ids: list of strings
          :param account_ids: The AWS account ids of the users who will be
                              give access to the specified actions.
  
          :type actions: list of strings
          :param actions: The actions you want to allow for each of the
                          specified principal(s).