code: def test_get_conn_authorize_using_instance_metadata_append_ssh_keys(
      self,
      mock_ssh_client,
      mock_paramiko,
      mock_os_login_hook,
      mock_compute_hook,
  ):
      del mock_os_login_hook
      mock_paramiko.SSHException = Exception
      mock_paramiko.RSAKey.generate.return_value.get_name.return_value = (
          "NAME"
      )
      mock_paramiko.RSAKey.generate.return_value.get_base64.return_value = (
          "AYZ"
      )
  
      mock_compute_hook.return_value.project_id = TEST_PROJECT_ID
      mock_compute_hook.return_value.get_instance_address.return_value = (
          EXTERNAL_IP
      )
  
      mock_compute_hook.return_value.get_instance_info.return_value = {
          "metadata": {
              "items": [
                  {"key": "ssh-keys", "value": f"{TEST_PUB_KEY2}\n"}
              ]
          }
      }
  
      hook = ComputeEngineSSHHook(
          instance_name=TEST_INSTANCE_NAME,
          zone=TEST_ZONE,
          use_oslogin=False,
      )
      result = hook.get_conn()
      assert mock_ssh_client.return_value == result
  
      mock_compute_hook.return_value.set_instance_metadata.assert_called_once_with(
          metadata={
              "items": [
                  {
                      "key": "ssh-keys",
                      "value": f"{TEST_PUB_KEY}\n{TEST_PUB_KEY2}\n",
                  }
              ]
          },
          project_id=TEST_PROJECT_ID,
          resource_id=TEST_INSTANCE_NAME,
          zone=TEST_ZONE,
      )
  
imports: from __future__ import annotations
  import json
  import logging
  from unittest import mock
  import httplib2
  import pytest
  from googleapiclient.errors import HttpError
  from paramiko.ssh_exception import SSHException
  from airflow.exceptions import AirflowException
  from airflow.models import Connection
  from airflow.providers.google.cloud.hooks.compute_ssh import ComputeEngineSSHHook
label_desc: Use image node_id 6 for calling the TestComputeEngineHookWithPassedProjectId obj's underlying member method code with example usage: obj.test_get_conn_authorize_using_instance_metadata_append_ssh_keys(mock_ssh_client, mock_paramiko, mock_os_login_hook, mock_compute_hook) without return types