https://airflow.apache.org/docs/apache-airflow/stable/configurations-ref.html#store-dag-code

![Captura de pantalla 2021-05-26 a las 17 47 56](https://user-images.githubusercontent.com/11339132/119691160-a2049a00-be4a-11eb-8f55-0ad2c6117620.png)

The Default is True or None?
tests/core/test_configuration.py
"""Get Config Value from a Secret Backend"""
        mock_client = mock.MagicMock()
        mock_hvac.Client.return_value = mock_client
        mock_client.secrets.kv.v2.read_secret_version.return_value = {
            'request_id': '2d48a2ad-6bcb-e5b6-429d-da35fdf31f56',
            'lease_id': '',
            'renewable': False,
            'lease_duration': 0,
            'data': {
                'data': {'value': 'sqlite:////Users/airflow/airflow/airflow.db'},
                'metadata': {
                    'created_time': '2020-03-28T02:10:54.301784Z',
                    'deletion_time': '',
                    'destroyed': False,
                    'version': 1,
                },
            },
            'wrap_info': None,
            'warnings': None,
            'auth': None,
        }
        test_config = '''[test]
sql_alchemy_conn_secret = sql_alchemy_conn
'''
        test_config_default = '''[test]
sql_alchemy_conn = airflow