ApiRequestor.php第108行无效请求:没有这样的客户:cus_9JHigF9SGUuVJQ

我只是想知道为什么我得到这个错误:

InvalidRequest in ApiRequestor.php line 108:
No such customer: cus_9JHigF9SGUuVJQ

，这是我的代码:

use Laravel'Cashier'Billable;
use Stripe'Stripe;
...
class BillingController extends Controller
{
    use Billable;
    public function postPayCharges( Request $request )
    {
        $account = 'App'Account::find( Auth::user()->account->account_id );
        $plan = 'App'Plan::find($account->plan_id);
        $ccToken = $request->input('stripeToken');
        $user = 'App'User::find(Auth::user()->user_id);
        $user->newSubscription($plan->name, $plan->plan_id)->create($ccToken, [
            'email' => $user->email,
        ]);

我确信我使用的条带公钥和秘钥是有效的。任何想法?