public async Task <IActionResult> Create(List <Availability> model, string id)
        {
            var user = await userManager.FindByIdAsync(id);

            if (user.Id != id)
            {
                return(Forbid());
            }

            if (user == null)
            {
                return(NotFound());
            }

            foreach (var m in model)
            {
                m.UserID = id;
                await availabilityRepository.Create(m);
            }

            return(RedirectToAction("index", "availability", new { id = id }));
        }