anchor.diff:  
   
   void handleGetRequest(HttpRequest request) async{
  -
  +try {
   Map jsonData = request.uri.queryParameters;
   
   if(jsonData['channel'] != null && jsonData['channel'] != ''){
  
positive.code: }
  }
  
  
  }
  
negative.code: 
  
  String getUsers(String channel){
  try{
  int index = findChannel(channel);
  
  if(index > -1){
  