public async Task <JsonResult> Insert()
 {
     try {
         var id     = Guid.NewGuid();
         var uid    = Guid.Parse(Request.Form["uid"]);
         var cmcID  = Guid.Parse(Request.Form["cmcID"]);
         var date   = DateTime.Now;
         var roomID = Guid.Parse(Request.Form["rid"]);
         if (CloudMessagingReceipentService.Insert(id, uid, cmcID, date, roomID))
         {
             return(Success(id.ToString()));
         }
         return(Failed(MessageUtility.ServerError()));
     } catch { return(Failed(MessageUtility.ServerError())); }
 }