/**
* {@inheritdoc}
*/
public function validateAccessTokenRequest($params, $requestUrl, $httpMethod = 'POST')
{
$required = ['oauth_consumer_key', 'oauth_signature', 'oauth_signature_method', 'oauth_nonce', 'oauth_timestamp', 'oauth_token'];
$this->_validateProtocolParams($params, $required);
$consumer = $this->_tokenProvider->getConsumerByKey($params['oauth_consumer_key']);
$tokenSecret = $this->_tokenProvider->validateAccessTokenRequest($params['oauth_token'], $consumer);
$this->_validateSignature($params, $consumer->getSecret(), $httpMethod, $requestUrl, $tokenSecret);
return $consumer->getId();
}