public async Task <OperationResult <List <ProducerPOCO> > > GetAllProducersAsync()
 {
     return(await ExecuteFunction(async() =>
     {
         var nodeList = await _nodeDAO.GetAllProducersAsync();
         foreach (var it in nodeList)
         {
             await _reqProducer.FetchValues(it);
         }
         return nodeList;
     }));
 }