public async Task <string> AddBarAsync(BarDTO barDTO) //tested
        {
            barDTO.ValidateIfNull(ExceptionMessages.BarDtoNull);
            barDTO.ImageUrl = _fileUploadService.SetUniqueImagePathForBar(barDTO.BarImage);

            var newBar     = barDTO.MapBarDTOToBar();              // to be tested in MapperTests
            var newAddress = barDTO.MapBarDTOToAddress();          // to be tested in MapperTests

            newBar.Address = newAddress;
            _context.Bars.Add(newBar);
            await _context.SaveChangesAsync();

            var coctailsInBar = barDTO.Cocktails.Select(c => c.MapToCocktailModel()).ToList();

            foreach (var cocktail in coctailsInBar)
            {
                AddCocktailToBar(cocktail, newBar);
            }

            await _context.SaveChangesAsync();

            return(newBar.Name);
        }