我在app/services文件夾中創(chuàng)建了服務(wù)，我正在使用它控制器。在服務(wù)文件夾中，我有以下內(nèi)容。namespace App\Services;use GuzzleHttp\Client;class SubscriptionService{    private $subUsername = 'M****************b';    private $subPassword = 'V********g';    private $subSource = 'o*********k';    private $subMinisite = 'a*******m';    public function pinVerify($request)    {        $DataArray = [];        $client = new Client();        $route = 'http://b*******e.com/****/P***y.php';        $params = [            'form_params' => [                'Username' => $this->subUsername,                'Password' => $this->subPassword,                'userID' => $request->user_id,                'pincode' => $request->pin_code,            ]        ];        $result = $client->request('POST', $route, $params);        $body = $result->getBody();        $bodyContent = $body->getContents();        if ($bodyContent === 1) {            $DataArray['message'] = 'Failed because of system error';            $DataArray['status'] = 'failed';        } else {            $DataArray['message'] = 'Sorry provided pincode is wrong.';            $DataArray['status'] = 'failed';        }        return $DataArray;    }}在控制器中，我以如下一種方法使用它。namespace App\Http\Controllers\Api;use Illuminate\Http\Request;use App\Http\Controllers\Controller;use App\Services\SubscriptionService as Subscription;class XyzController extends Controller{    public function verifyPinCode(Subscription $Subscription, Request $request){        $serviceResponse = $Subscription->pinVerify($request);        return response()->json($serviceResponse, 200);     }}結(jié)果我收到錯(cuò)誤，Class does not exist.我不確定我在哪里犯了錯(cuò)誤。有人可以指導(dǎo)我如何解決這個(gè)問(wèn)題嗎？錯(cuò)誤ReflectionExceptionClass App\Services\SubscriptionService does not existPrevious exceptionssyntax error, unexpected ''pincode'' (T_CONSTANT_ENCAPSED_STRING)Composer.json"autoload": {        "classmap": [            "database/seeds",            "database/factories"        ],        "psr-4": {            "App\\": "app/"        }    },