问刷新OAuth2令牌时出错，消息：'{“错误”："unauthorized_client"，"error_description“：”未经授权的客户端或请求中的范围“}。

EN

    $service_account_name = '<Service Email>@developer.gserviceaccount.com';
    $key_file_location = '<keyName>.p12';
    $key = file_get_contents($key_file_location);
    $cred = new Google_Auth_AssertionCredentials(
        $service_account_name,
        array(Google_Service_Analytics::ANALYTICS),
        $key,
        'notasecret',
        'http://oauth.net/grant_type/jwt/1.0/bearer',
        '<My email>'
    );
$client->getAuth()->setAssertionCredentials($cred);
$service = new Google_Service_Analytics($client);
$result = $service->data_ga->get("ga:<profileID>", "yesterday", "today", "ga:pageviews");
print_r( $result);