def METHOD_NAME(mocker):
    mock_response = requests.Response()
    mock_response.status_code = 400
    mocker.patch(
        target="openbb_terminal.helper_funcs.requests.get",
        new=mocker.Mock(return_value=mock_response),
    )
    result = tradier_model.get_last_price(symbol="AAPL")
    assert result is None