public async Task <IActionResult> SetNick(ChangeNickViewModel model)
        {
            if (!ModelState.IsValid)
            {
                return(View(model));
            }
            ApplicationUser appUser = await _userManager.GetUserAsync(HttpContext.User);

            User user = _repository.GetUser(Guid.Parse(appUser.Id));

            _repository.SetNick(model.Nick, user.Id, user.ActiveGroup.Id);
            return(Redirect("Index"));
        }
        public async Task <IActionResult> SetNick()
        {
            ApplicationUser appUser = await _userManager.GetUserAsync(HttpContext.User);

            User user = _repository.GetUser(Guid.Parse(appUser.Id));

            if (user.ActiveGroup == null)
            {
                return(Forbid());
            }

            ChangeNickViewModel model = new ChangeNickViewModel()
            {
                Nick = _repository.GetNick(user.Id, user.ActiveGroup.Id)
            };

            return(View(model));
        }