授权失败 [全能支付和PayPal]

授权失败

这是我的代码：

$gateway = Omnipay::create('PayPal_Express');
        // Initialise the gateway
        $gateway->initialize(array(
            'clientId' => 'AZzCeImpURKHH0LIFSBTrEWGY-NKLCnUUQdHT049pRLvwBXg9BnlpbnsiGLPFQH43DU4eL-Qi96nrZU6',
            'secret' => 'EFP_mny9dfaaAfW1oyNM8R05weA5eIkU51KUSAdbvcoh3v4bo7txRBm-uzDZ2nOlZ0KmqS-JalgujFok',
            'testMode' => true, // Or false when you are ready for live transactions
        ));
        // Do an authorisation transaction on the gateway
        $transaction = $gateway->authorize(array(
            'returnUrl' => 'http://client.com',
            'cancelUrl' => 'http://localhost:8000/cancel',
            'amount' => '10.00',
            'currency' => 'AUD',
            'description' => 'This is a test authorize transaction.',
                // 'card'          => $card,
        ));
        $response = $transaction->send();
        if ($response->isSuccessful()) {
            // Find the authorization ID
            $authResponse = $response->getTransactionReference();
            echo "Authorize transaction was successful!'n" . $authResponse;
        } else {
            echo "Failed to auth transaction";
            dd($response);
        }
        // Once the transaction has been approved, we need to complete it.
        $transaction = $gateway->completePurchase(array(
            'payerId' => $request->PayerID,
            'transactionReference' => $authResponse
        ));
        $finalResponse = $transaction->send();
        dd($finalResponse);
        if ($finalResponse->getData()) {
            echo "Transaction was successful!'n";
            // Find the authorization ID
            $results = $finalResponse->getTransactionReference();
            dd($results);
        } else {
            dd($finalResponse->getData());
        }

我正在尝试使用我的 laravel 应用程序设置PayPal发送框。这段代码在 get 方法中，当我调用它时，我得到：

Failed to auth transaction
ExpressAuthorizeResponse {#354 ▼
  #liveCheckoutEndpoint: "https://www.paypal.com/cgi-bin/webscr"
  #testCheckoutEndpoint: "https://www.sandbox.paypal.com/cgi-bin/webscr"
  #request: ExpressAuthorizeRequest {#349 ▶}
  #data: array:9 [▼
    "TIMESTAMP" => "2016-02-12T15:06:21Z"
    "CORRELATIONID" => "68efe51d8aca6"
    "ACK" => "Failure"
    "VERSION" => "119.0"
    "BUILD" => "18308778"
    "L_ERRORCODE0" => "10002"
    "L_SHORTMESSAGE0" => "Authentication/Authorization Failed"
    "L_LONGMESSAGE0" => "You do not have permissions to make this API call"
    "L_SEVERITYCODE0" => "Error"
  ]
}

有人知道问题是什么吗？谢谢