class_docstr: Test class for the DuoApp
docstr: DuoApp - Required Auth Info
docstr_tok: ["DuoApp","-","Required","Auth","Info"]
code: def test_required_auth_info(self):
      """DuoApp - Required Auth Info"""
      assert_count_equal(
          list(self._app.required_auth_info().keys()),
          {"api_hostname", "integration_key", "secret_key"},
      )
  
imports: import os
  from mock import Mock, patch
  from moto import mock_ssm
  from nose.tools import assert_equal, assert_false, assert_count_equal, raises
  import requests
  from streamalert.apps._apps.duo import DuoAdminApp, DuoApp, DuoAuthApp
  from tests.unit.streamalert.apps.test_helpers import get_event, put_mock_params
  from tests.unit.streamalert.shared.test_config import get_mock_lambda_context
label_desc: Use image node_id 5 for calling the TestDuoApp obj's underlying member method code with example usage: obj.test_required_auth_info() without return types