public void AddUserDevice(AddUserDeviceRequestModel model)
 {
     _dbContext.MltpUserDevice.Add(new MltpUserDevice
     {
         AppId        = model.AppId,
         CreateDate   = DateTime.Now,
         PhoneModel   = model.PhoneModel,
         PhoneVersion = model.PhoneVersion,
         Platform     = model.Platform,
         UserId       = model.UserId
     });
     _dbContext.SaveChanges();
 }