Работаю с API Google Calendar

if (php_sapi_name() != 'cli') {
    throw new Exception('This application must be run on the command line.');
}
 
 
/**
 * Returns an authorized API client.
 * @return Google_Client the authorized client object
 */
function getClient()
{
    $client = new Google_Client();
    $client->setApplicationName('Google Calendar API PHP Quickstart');
    $client->setScopes('https://www.googleapis.com/auth/calendar.events.readonly');
    $client->setAuthConfig('credentials.json');
    $client->setAccessType('offline');
    $client->setPrompt('select_account consent');
 
    // Load previously authorized token from a file, if it exists.
    // The file token.json stores the user's access and refresh tokens, and is
    // created automatically when the authorization flow completes for the first
    // time.
    $tokenPath = 'token.json';
    if (file_exists($tokenPath)) {
        $accessToken = json_decode(file_get_contents($tokenPath), true);
        $client->setAccessToken($accessToken);
    }
 
    // If there is no previous token or it's expired.
    if ($client->isAccessTokenExpired()) {
        // Refresh the token if possible, else fetch a new one.
        if ($client->getRefreshToken()) {
            $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
        } else {
            // Request authorization from the user.
            $authUrl = $client->createAuthUrl();
            printf("Open the following link in your browser:\n%s\n", $authUrl);
            print 'Enter verification code: ';
            $authCode = trim(fgets(STDIN));
 
            // Exchange authorization code for an access token.
            $accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
            $client->setAccessToken($accessToken);
 
            // Check to see if there was an error.
            if (array_key_exists('error', $accessToken)) {
                throw new Exception(join(', ', $accessToken));
            }
        }
        // Save the token to a file.
        if (!file_exists(dirname($tokenPath))) {
            mkdir(dirname($tokenPath), 0700, true);
        }
        file_put_contents($tokenPath, json_encode($client->getAccessToken()));
    }
    return $client;
}
 
 
// Get the API client and construct the service object.
$client = getClient();
$service = new Google_Service_Calendar($client);
 
// Print the next 10 events on the user's calendar.
try{
 
    $calendarId = 'primary';
    $optParams = array(
        'maxResults' => 10,
        'orderBy' => 'startTime',
        'singleEvents' => true,
        'timeMin' => date('c'),
    );
    $results = $service->events->listEvents($calendarId, $optParams);
    $events = $results->getItems();
 
    if (empty($events)) {
        print "No upcoming events found.\n";
    } else {
        print "Upcoming events:\n";
        foreach ($events as $event) {
            $start = $event->start->dateTime;
            if (empty($start)) {
                $start = $event->start->date;
            }
            printf("%s (%s)\n", $event->getSummary(), $start);
        }
    }
}
catch(Exception $e) {
    // TODO(developer) - handle error appropriately
    echo 'Message: ' .$e->getMessage();
}