public function verifyIfSigned ( $token_type = 'access' )
	{
		if ($this->getParam('oauth_consumer_key'))
		{
			OAuthRequestLogger::start($this);
			$this->verify($token_type);
			$signed = true;
			OAuthRequestLogger::flush();
		}
		else
		{
			$signed = false;
		}
		return $signed;
	}