/**
* Returns a 401 response with the referred URL and the app ID in a JSON response
*
* @return void
*/
private function _badToken401()
{
$this->addCorsHeaders();
Utils::header("HTTP/1.1 401 Unauthorized");
Utils::header('Content-type: application/json');
echo json_encode((object) ['tokenService' => $this->_tokenServiceUrl . "login?" . http_build_query(['redirectURL' => $this->_refUrl, 'service' => $this->_appID])]);
// Use a testable method instead of calling exit() directly
Utils::exitApp();
}