code: def get_account_entitlement_for_user(self, user_id, determine_rights=None, create_if_not_exists=None):
          
          route_values = {}
          if user_id is not None:
              route_values['userId'] = self._serialize.url('user_id', user_id, 'str')
          query_parameters = {}
          if determine_rights is not None:
              query_parameters['determineRights'] = self._serialize.query('determine_rights', determine_rights, 'bool')
          if create_if_not_exists is not None:
              query_parameters['createIfNotExists'] = self._serialize.query('create_if_not_exists', create_if_not_exists, 'bool')
          response = self._send(http_method='GET',
                                location_id='6490e566-b299-49a7-a4e4-28749752581f',
                                version='5.1-preview.1',
                                route_values=route_values,
                                query_parameters=query_parameters)
          return self._deserialize('AccountEntitlement', response)
docs: GetAccountEntitlementForUser.
          [Preview API] Get the entitlements for a user
          :param str user_id: The id of the user
          :param bool determine_rights:
          :param bool create_if_not_exists:
          :rtype: :class:`<AccountEntitlement> <azure.devops.v5_1.licensing.models.AccountEntitlement>`