public IActionResult Index()
        {
            var Training = _context.Trainings.Select(t => t.Type).ToList();
            var Sports   = _context.Sports.GroupBy(x => x.TrainingId)
                           .Select(y => y.Count())
                           .ToList();

            ViewModelSport sport = new ViewModelSport
            {
                Sports    = Sports,
                Trainings = Training
            };

            return(View(sport));
        }
        public async Task <IActionResult> Details()
        {
            ApplicationUser currentUser = await _userManager.GetUserAsync(User);

            var Training = _context.Trainings.Select(t => t.Type).ToList();
            var Sports   = _context.Sports.Where(s => s.ApplicationUserId == currentUser.Id)
                           .GroupBy(x => x.TrainingId)
                           .Select(y => y.Count())
                           .ToList();

            ViewModelSport sport = new ViewModelSport
            {
                Sports    = Sports,
                Trainings = Training
            };

            return(View(sport));
        }