Google Calendar API Token not refreshing

For some reason when my token expires I need to delete the file and reconnect again otherwise nothing is working. Is it because the new token is not stored or?

I have the following code:

if(!$_GET['id']){
            echo print_r('BUSINESS NOT FOUND');
            exit();
        }else {

            $client = new Google_Client();
            $client->setApplicationName('Google Calendar API PHP Quickstart');
            $client->setScopes(Google_Service_Calendar::CALENDAR);
            $client->setAuthConfig(__DIR__ . '/client.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 = '../Remindly/accounts/' . $_GET['id'] . '.json';
            if (file_exists($tokenPath)) {
                $accessToken = json_decode(file_get_contents($tokenPath), true);
                $client->setAccessToken($accessToken);
                return $client;
            }

            // 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());
                }
                // Save the token to a file.
                file_put_contents($tokenPath, json_encode($client->getAccessToken()));
            }

        }

Answer

It seems that you are not returning client in case the token expired

Modify your code as shown in the quickstart for PHP to return the client at the end of the function – both if the access token expired and if it did not:

...
if(...){
...
}else{
    $client = new Google_Client();
    $client->setApplicationName('Google Calendar API PHP Quickstart');
    $client->setScopes(Google_Service_Calendar::CALENDAR_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%sn", $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;
}
...