code: def user_get(self, domain, userid):
          
          path = self._get_management_path(domain, userid)
          return self.http_request(path=path,
                                   method='GET')
docs: Retrieve a user from the server
  
          :param AuthDomain domain: The authentication domain for the user.
          :param userid: The user ID.
          :raise: :exc:`couchbase.exceptions.HTTPError` if the user does not exist.
          :return: :class:`~.HttpResult`. The user can be obtained from the
              returned object's `value` property.