code: def QueryUsers(self, database_link, query, options=None):
          
          if options is None:
              options = {}
  
          path = base.GetPathFromLink(database_link, 'users')
          database_id = base.GetResourceIdOrFullNameFromLink(database_link)
          def fetch_fn(options):
              return self.__QueryFeed(path,
                                      'users',
                                      database_id,
                                      lambda r: r['Users'],
                                      lambda _, b: b,
                                      query,
                                      options), self.last_response_headers
          return query_iterable.QueryIterable(self, query, options, fetch_fn)
docs: Queries users in a database.
  
          :param str database_link:
              The link to the database.
          :param (str or dict) query:
          :param dict options:
              The request options for the request.
  
          :return:
              Query Iterable of Users.
          :rtype:   
              query_iterable.QueryIterable