added le-r10-certificate and removed/added some logging

lib/api/mhsl/notify/register/notifyRegister.dart

@@ -20,7 +20,7 @@ class NotifyRegister extends MhslApi<void> {
   @override
   Future<http.Response> request(Uri uri) {
     var requestString = jsonEncode(params.toJson());
-    log(requestString);
+    log('register at push proxy with username ${params.username}');
     return http.post(uri, body: requestString);
   }
 }