add packageSourceCredentials

src/authutil.ts

@@ -172,6 +172,10 @@ function writeFeedToFile(
     });
   });
 
+  xmlSource[1].configuration.push({
+    packageSourceCredentials
+  });
+
   // If NuGet fixes itself such that on Linux it can look for environment variables in the config file (it doesn't seem to work today),
   // use this for the value above
   //           process.platform == 'win32'