public function validateRequest(sfWebRequest $request)
{
$server = $this->getOAuthServer();
$oauthRequest = $this->getOAuthRequest();
$oauthResponse = $this->getOAuthResponse();
if (!$server->verifyResourceRequest($oauthRequest, $oauthResponse)) {
$server->getResponse()->send();
throw new sfStopException();
}
$tokenData = $server->getAccessTokenData($oauthRequest, $oauthResponse);
$userId = $tokenData['user_id'];
$userService = new SystemUserService();
$user = $userService->getSystemUser($userId);
$authService = new AuthService();
$authService->setLoggedInUser($user);
$this->getAuthenticationService()->setCredentialsForUser($user, array());
}