public IActionResult CreateCategory([FromBody] CategoryForCreationDto categoryForCreationDto)
        {
            if (categoryForCreationDto == null)
            {
                return(BadRequest());
            }

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            var categoryEntity = Mapper.Map <Category>(categoryForCreationDto);

            repository.AddCategory(categoryEntity);

            repository.Save();

            return(Ok());
        }