需要设置Laravel Braintree \ Configuration :: merchantId或将accessToken传递给Braintree \ Gateway

如何解决需要设置Laravel Braintree \ Configuration :: merchantId或将accessToken传递给Braintree \ Gateway

请帮助我，在正确安装braintree版本“ 5.3”之后，我试图使laravel项目上的贝宝付款有效，但它不起作用 这让我犯了这个错误：需要设置Braintree \ Configuration :: merchantId（或将accessToken传递给Braintree \ Gateway）
这是我的：
checkout.blade.php

@extends('layouts.default')                             
@section('content')           
 //code                 
@endsection                 
@section('extra-js')
  
    <script src="https://js.braintreegateway.com/web/dropin/1.13.0/js/dropin.min.js"></script>
    <script>

            (function(){
            var form = document.querySelector('#paypal-payment-form');
            var client_token = "{{ $paypalToken }}";

            braintree.dropin.create({
              authorization: client_token,selector: '#bt-dropin',paypal: {
                flow: 'vault'
              }
            },function (createErr,instance) {
              if (createErr) {
                console.log('Create Error',createErr);
                return;
              }

              // remove credit card option
              var elem = document.querySelector('.braintree-option__card');
              elem.parentNode.removeChild(elem);

              form.addEventListener('submit',function (event) {
                event.preventDefault();

                instance.requestPaymentMethod(function (err,payload) {
                  if (err) {
                    console.log('Request Payment Method Error',err);
                    return;
                  }

                  // Add the nonce to the form and submit
                  document.querySelector('#nonce').value = payload.nonce;
                  form.submit();
                });
              });
            });

        })();
    </script>
@endsection                             

这是我的 checkoutcontroller.php

public function index()
    {
        $gateway = new \Braintree\Gateway([
            'environment' => config('services.braintree.environment'),'merchantId' => config('services.braintree.merchantId'),'publicKey' => config('services.braintree.publicKey'),'privateKey' => config('services.braintree.privateKey')
        ]);

        
            $paypalToken = $gateway->ClientToken()->generate();
       

        
        return view('checkout')->with([
            'paypalToken' => $paypalToken,]);
    }                                  

当然，我将其添加到了我的配置services.php

 'braintree' => [
        'environment' => env('BT_ENVIRONMENT','sandbox'),'merchantId' => env('BT_MERCHANT_ID'),'publicKey' => env('BT_PUBLIC_KEY'),'privateKey' => env('BT_PRIVATE_KEY'),],