public async Task <bool> CreateAdult(string firstName, string lastName, int age, string job, Singiel singiel, double salary)
        {
            try
            {
                if (String.IsNullOrEmpty(firstName) || String.IsNullOrEmpty(lastName) ||
                    String.IsNullOrEmpty(age.ToString()) || String.IsNullOrEmpty(job) ||
                    String.IsNullOrEmpty(singiel.ToString()) || String.IsNullOrEmpty(salary.ToString()))
                {
                    return(false);
                }
                else
                {
                    Adult adult = new Adult()
                    {
                        Id        = Guid.NewGuid(),
                        FirstName = firstName,
                        LastName  = lastName,
                        Age       = age,
                        Job       = job,
                        Singiel   = singiel,
                        Salary    = salary
                    };

                    _db.Adults.Add(adult);

                    await _db.SaveChangesAsync();

                    return(true);
                }
            }
            catch (Exception)
            {
                return(false);
            }
        }
        public async Task <ActionResult> Create(string firstName, string lastName, int age, string job, Singiel singiel, double salary)
        {
            if (ModelState.IsValid)
            {
                await _adultService.CreateAdult(firstName, lastName, age, job, singiel, salary);

                return(RedirectToAction("Display"));
            }
            else
            {
                return(View(firstName, lastName, age));
            }
        }