Youtube分析API返回Google_服务_异常错误

我想从Youtube频道检索过去的分析。我已经在谷歌开发者控制台中启用了Youtube分析API。我拥有这个频道，但我不是内容所有者。他们向我提供了内容所有者ID，并允许我访问Youtube CMS，他们说我现在应该可以使用Youtube分析API了。我正在使用带有codeigniter的

GoogleAPI php客户端

我在尝试检索数据时遇到此错误

Type: Google_Service_Exception

Message: { "error": { "code": 400, "message": "Required", "errors": [ { "message": "Required", "domain": "global", "reason": "required" } ] } }

我读到这意味着我缺少一个必需的参数

我的代码

    $CLIENT_ID = "xxx";
    $CLIENT_SECRET = "xxx";
    

    require_once APPPATH . 'third_party/Google/src/Google/Client.php';
    require_once APPPATH . 'third_party/Google/vendor/google/apiclient-services/src/Google/Service/YouTube.php';
    require_once APPPATH . 'third_party/Google/vendor/google/apiclient-services/src/Google/Service/YouTubeAnalytics.php';

    $access_token = $this->getToken();

    $client = new Google_Client();
    $client->setClientId($CLIENT_ID);
    $client->setClientSecret($CLIENT_SECRET);
    $client->setScopes(array('https://www.googleapis.com/auth/youtube.readonly', 'https://www.googleapis.com/auth/yt-analytics.readonly'));

    $channel_id = "xxx";

    $youtube = new Google_Service_YouTube($client);
    $client->setAccessToken($access_token);

    $analytics = new Google_Service_YouTubeAnalytics($client);
    // $client is your Google_Client object

    $id = 'channel=='.$channel_id;
    $start_date = '2020-08-01';
    $end_date = '2020-08-27';
    $optparams = array(
        'dimensions' => '7DayTotals',
        'sort' => 'day',
    );

    $metrics = array(
        'views',
        'estimatedMinutesWatched',
        'averageViewDuration',
        'comments',
        'favoritesAdded',
        'favoritesRemoved',
        'likes',
        'dislikes',
        'shares',
        'subscribersGained',
        'subscribersLost'
    );

    $api_response = $metrics;

    foreach ($metrics as $metric)
    {
        $api = $analytics->reports->query($id, $start_date, $end_date, $metric, $optparams);
        if (isset($api['rows'])) $api_response[$metric] = $api['rows'][0][0];
    }





 }

我缺少什么参数