Wy i have response 400 ? #45

Hello, i have problem,

I followed the documentation to make a payment except that it doesn't work, I use the php sdk, here is an extract of my code:

`try {
$data = json_encode([
'payment_type' => 'card',
'card' => [
'name' => 'John Doe',
'number' => '4242424242424242',
'expiry_month' => '12',
'expiry_year' => '34',
'cvv' => '123',
],
]);

        $sumup = new SumUp([
            'app_id' => $this->clientId,
            'app_secret' => $this->clientSecert,
            'grant_type' => 'client_credentials',
            'scopes' => ['payments', 'payment_instruments', 'transactions.history', 'user.app-settings', 'user.profile_readonly'],
        ]);

// $checkoutsService = $sumup->getCheckoutService();
// $response = $checkoutsService->create(20, 'EUR', 'C4F45478R', 'dev_gabutyqs@sumup.com', 'Sample one-time payment');
// $checkoutId = $response->getBody()->id;
// dump($checkoutId);
$customService = $sumup->getCustomService();
$checkoutId = "17b5fb52-4c02-4c46-ad25-6a9a202a4402";
$response = $customService->request('PUT', "/v0.1/checkouts/{$checkoutId}", $data);
//$response = $customService->request('GET', '/v0.1/checkouts');
dump($response->getBody());
} catch (SumUpSDKException $exception) {
dd($exception);
}`

this is account test, wy the card john doe not work ? is return 400 for me ;

SumupApi.php on line 44:
SumUp\Exceptions\SumUpResponseException {#901 ▼
#message: "Client error"
#code: 400
#file: "/home/belhassen/Documents/dev/ams/ams-mantes-association/vendor/sumup/sumup-ecom-php-sdk/src/SumUp/HttpClients/Response.php"
#line: 103

can you help me ? thanks for you response