anchor.diff:  }
   }
   
  -
  -}
  +}Exception catch(e){
  +print('Unknown exception: $e');
  +return '''{"user":["fail"]}''';
  +}
  +}
  
positive.code: 
  
  String getUsers(String channel){
  
  int index = findChannel(channel);
  
  if(index > -1){
  
negative.code: res.write(jsonString);
  res.close();
  }
  }Exception catch(e){
  print('Unknown exception: $e');
  }
  
  void handlePostRequest(HttpRequest request) async{
  