Add downloader namespace

installer/Installer/MainWindow.xaml.cs

@@ -122,8 +122,8 @@ namespace Downloader
                   .Build();  //创建 CosXmlConfig 对象
 
                 //永久密钥访问凭证
-                string secretId = "AKIDvhEVXN4cv0ugIlFYiniV6Wk1McfkplYA"; //"云 API 密钥 SecretId";
-                string secretKey = "YyGLGCJG4f5VsEUddnz9JSRPSSK8sYBo"; //"云 API 密钥 SecretKey";
+                string secretId = ""; //"云 API 密钥 SecretId";
+                string secretKey = ""; //"云 API 密钥 SecretKey";
 
                 long durationSecond = 1000;  //每次请求签名有效时长，单位为秒
                 QCloudCredentialProvider cosCredentialProvider = new DefaultQCloudCredentialProvider(