code: def test_get_non_existing_key_v2(self, mock_hvac):
      mock_client = mock.MagicMock()
      mock_hvac.Client.return_value = mock_client
      # Response does not contain the requested key
      mock_client.secrets.kv.v2.read_secret_version.side_effect = (
          InvalidPath()
      )
      vault_client = _VaultClient(
          auth_type="token",
          token="s.7AU0I51yv1Q1lxOIg1F3ZRAS",
          url="http://localhost:8180",
      )
      secret = vault_client.get_secret(secret_path="missing")
      assert secret is None
      mock_client.secrets.kv.v2.read_secret_version.assert_called_once_with(
          mount_point="secret",
          path="missing",
          version=None,
          raise_on_deleted_version=True,
      )
  
imports: from __future__ import annotations
  from unittest import mock
  from unittest.mock import mock_open, patch
  import pytest
  from hvac.exceptions import InvalidPath, VaultError
  from requests import Session
  from requests.adapters import HTTPAdapter
  from urllib3.util import Retry
  from airflow.providers.hashicorp._internal_client.vault_client import _VaultClient
label_desc: Use image node_id 39 for calling the TestVaultClient obj's underlying member method code with example usage: obj.test_get_non_existing_key_v2(mock_hvac) without return types