Getting invalid input error at amazon selling partner api

[muazzamazaz]

<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use Carbon\Carbon;

class AmazonSPApiService
{
    private $accessKeyId;
    private $secretAccessKey;
    private $refreshToken;
    private $clientId;
    private $clientSecret;
    private $sellerId;

    public function __construct()
    {
        $this->accessKeyId = env('AMAZON_SP_API_ACCESS_KEY_ID');
        $this->secretAccessKey = env('AMAZON_SP_API_SECRET_ACCESS_KEY');
        $this->refreshToken = env('AMAZON_SP_API_REFRESH_TOKEN');
        $this->clientId = env('AMAZON_SP_API_CLIENT_ID');
        $this->clientSecret = env('AMAZON_SP_API_CLIENT_SECRET');
        $this->sellerId = env('AMAZON_SP_API_SELLER_ID');
    }

    private function getAccessToken()
    {
        $url = 'https://api.amazon.com/auth/o2/token';
        $response = Http::asForm()->post($url, [
            'grant_type' => 'refresh_token',
            'refresh_token' => $this->refreshToken,
            'client_id' => $this->clientId,
            'client_secret' => $this->clientSecret,
        ]);

        $data = $response->json();
 
        return $data['access_token'];
    }

    private function makeApiRequest($endpoint, $method = 'GET', $params = [])
    {
        $token = $this->getAccessToken();
        $url = "https://sellingpartnerapi-na.amazon.com$endpoint";
//   dd($token);
        try {
            $response = Http::withHeaders([
                'Authorization' => "Bearer $token",
                'x-amz-access-token' => $token,
                'x-amz-date' => Carbon::now()->format('Ymd\THis\Z'),
            ])->$method($url, $params);
dd($response->json());
            return $response->json();
        } catch (\Exception $e) {
            Log::error('Error making SP API request: ' . $e->getMessage());
            return null;
        }
    }

    public function getProducts()
    {
        $endpoint = '/catalog/v0/items'; // Example endpoint for catalog
        $params = [
            'asin' => 'B07JGTVTWN', // Example ASIN, replace with your own
            'marketplaceId' => 'ATVPDKIKX0DER', // Example marketplace ID
        ];
        return $this->makeApiRequest($endpoint, 'GET', $params);
    }

    // Add more methods to interact with other SP API endpoints
}

Route: Route::get('/amazon-products', [AmazonSPApiController::class, 'getProducts']);

and controller class:

use App\Services\AmazonSPApiService;
use Illuminate\Http\Request;

class AmazonSPApiController extends Controller
{
    protected $amazonSPApiService;

    public function __construct(AmazonSPApiService $amazonSPApiService)
    {
        $this->amazonSPApiService = $amazonSPApiService;
    }

    public function getProducts()
    {
        $products = $this->amazonSPApiService->getProducts();

        if ($products) {
            return response()->json(['data' => $products]);
        } else {
            return response()->json(['error' => 'Unable to fetch products'], 500);
        }
    }

this cataglog items api returns Invalid Input error when I call above route where controller class is using AmazonSPApiService service