code: def test_should_raises_401_unauthenticated(self, session):
      pool = Pool(pool="test_pool", slots=2, include_deferred=False)
      session.add(pool)
      session.commit()
  
      response = self.client.patch(
          "api/v1/pools/test_pool",
          json={"name": "test_pool_a", "slots": 3},
      )
  
      assert_401(response)
  
imports: from __future__ import annotations
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.models.pool import Pool
  from airflow.security import permissions
  from airflow.utils.session import provide_session
  from tests.test_utils.api_connexion_utils import assert_401, create_user, delete_user
  from tests.test_utils.config import conf_vars
  from tests.test_utils.db import clear_db_pools
label_desc: Use image node_id 4 for calling the TestPatchPool obj's underlying member method code with example usage: obj.test_should_raises_401_unauthenticated(session) without return types