谷歌API-刷新令牌

Question

我正试图在他过期后获得一个新的访问令牌。我已将收到的信息保存在银行中，作为第一次客户访问的回报：

{"access_token"："TOKEN"，"refresh_token"："TOKEN"，"token_type"，"承载"，"expires_in"： 3600，"创建"： 1320790426}

令牌到期后，我需要申请一个新的令牌，我这样做：

$client = new Google_Client();
$client->setApplicationName(APPLICATION_NAME);
$client->setScopes(SCOPES);
$client->setAuthConfigFile(CLIENT_SECRET_PATH);
$client->setAccessType('offline');

$token['access_token']  = $db->dados[0]['use_access_token'];
$token['refresh_token'] = $db->dados[0]['use_refresh_token'];
$token['token_type']    = $db->dados[0]['use_token_type'];
$token['expires_in']    = $db->dados[0]['use_expires_in'];
$token['created']       = $db->dados[0]['use_created'];

$client->setAccessToken(json_encode($token));

if ($client->isAccessTokenExpired()) {
    echo "Expired !";
    $client->refreshToken($client->getRefreshToken());
    //$accessToken = $client->authenticate($authCode);
} else {
    ...
}

问题是总是返回以下错误：刷新OAuth2令牌时出错，消息：

{“错误”：“无效的授权”}

Answer 1

    $client->refreshToken($refreshToken);
    $newtoken=$client->getAccessToken();
    echo $newtoken."</br>";