protected function verifyAccessToken($oAuthVerifier) {
		$uri = new Uri('https://api.twitter.com/oauth/access_token');
		$request = Request::create($uri, 'POST', array('oauth_verifier' => $oAuthVerifier));
		$request = $this->requestSignatureGenerator->signRequest($request);
		$request->setHeader('Content-Type', 'application/x-www-form-urlencoded', TRUE);

		$response = $this->requestEngine->sendRequest($request);
		$responseData = array();
		parse_str($response->getContent(), $responseData);
		$responseData['statusCode'] = $response->getStatusCode();

		return $responseData;
	}