public async Task <SkillModel> CreateSkillAsync(int heroId, SkillModel skillModel)
        {
            await ValidateHero(heroId);

            if (skillModel.HeroId != null && skillModel.HeroId != heroId)
            {
                throw new BadRequestException($"You cant create the skill with that hero id, try with {heroId}");
            }
            skillModel.HeroId = heroId;
            SkillEntity skillEntity = _mapper.Map <SkillEntity>(skillModel);

            skillEntity.HeroId = heroId;
            _libraryRepository.CreateSkill(skillEntity);
            var res = await _libraryRepository.SaveChangesAsync();

            if (res)
            {
                return(_mapper.Map <SkillModel>(skillEntity));
            }
            throw new Exception("Database Exception");
        }