UpdateAsync logic from CategoryService, of Supermarket API

CategoryService.cs

public async Task<SaveCategoryResponse> UpdateAsync(int id, Category category)
{
	var existingCategory = await _categoryRepository.FindByIdAsync(id);

	if (existingCategory == null)
		return new SaveCategoryResponse("Category not found.");

	existingCategory.Name = category.Name;

	try
	{
		_categoryRepository.Update(existingCategory);
		await _unitOfWork.CompleteAsync();

		return new SaveCategoryResponse(existingCategory);
	}
	catch (Exception ex)
	{
		// Do some logging stuff
		return new SaveCategoryResponse($"An error occurred when updating the category: {ex.Message}");
	}
}