public async Task Create(CreateEventHeaderDto input)
{
var @eventHeader = input.MapTo <EventHeader>();
@eventHeader = EventHeader.Create(AbpSession.GetTenantId(), input.Name, input.Description, input.Type, input.Date.Value, input.Frequency, input.ExpectedDate.Value, input.Department, input.Venue);
await _eventHeaderRepository.InsertAsync(@eventHeader);
}