public void Handle(EmployeeChangedDomainEvent domainEvent)
 {
 //do something here
 var emp = _empRepository.FindById(domainEvent.EmpId);
 var log = new Log
     {
     Message = $"Emp: {emp.FirstName} - {emp.LastName} has changed"
     };
 _dbContext.Logs.Add(log);
 }