{
    "error": {
        "errors": [{
            "domain": "global",
            "reason": "authError",
            "message": "Invalid Credentials",
            "locationType": "header",
            "location": "Authorization"
        }],
        "code": 401,
        "message": "Invalid Credentials"
    }
}

curl -H "Authorization: OAuth ya29.xyzxyz" "https://www.googleapis.com/plus/v1/people/me"

$oauth = new OAuth($this->config->consumer_key, $this->config->consumer_secret, $this->config->signature_method, $this->config->auth_type);
        $oauth->setVersion($this->config->version);
        $oauth->setToken($accessToken->oauth_token, $accessToken->oauth_token_secret);

        $params = array(
            'fields' => 'displayName,emails,id,image,name',
            'pp' => 1
        );

        $oauth->fetch('https://www.googleapis.com/plus/v1/people/me', $params, OAUTH_HTTP_METHOD_GET);

        // extract response
        $json = Zend_Json::decode($oauth->getLastResponse(), Zend_Json::TYPE_OBJECT);