如何在Laravel 5.1中使用AWS SNS将推送通知从Web发送到iOS和android设备？

我编码像

$sns = App::make('aws')->createClient('sns');

    $data = json_encode([
        'APNS' => ['apns' => [
                'alert' => $message
            ]
        ]
    ]);

    Log::info($data);

    $sns->publish(array(
        'Message' => $data,
        'TargetArn' => "arn:aws:sns:us-west-2:360542326270:endpoint/APNS_SANDBOX/Testtest/20a75cd1-da25-3331-8126-4db497cbdd5e"
    ));

我收到如下错误：

[Aws\Sns\Exception\SnsException]                                                                                                                                                        

在“ https://sns.us-east-1.amazonaws.com ”上执行“发布”时出错；AWS HTTP错误：客户端错误：POST https://sns.us-east-1.amazonaws.com导致400 Bad Request响应：

  <Type>Sender</Type>                                                                                                                                                                 
  <Code>InvalidPara (truncated...)                                                                                                                                                    

InvalidParameter（客户端）：无效参数：TargetArn原因：未找到指定目标arn的端点-

  <Type>Sender</Type>                                                                                                                                                                 
  <Code>InvalidParameter</Code>                                                                                                                                                       
  <Message>Invalid parameter: TargetArn Reason: No endpoint found for the target arn specified</Message>                                                                              

<RequestId>18937e90-5453-5e30-bf89-315a59c3f2af</RequestId>                                                                                                                           

[GuzzleHttp \ Exception \ ClientException]
客户端错误：POST https://sns.us-east-1.amazonaws.com导致400 Bad Request响应：

  <Type>Sender</Type>                                                                             
  <Code>InvalidPara (truncated...) 

谁能帮我找到解决方案？提前致谢..