public async Task <IActionResult> Create(ThemeActionsViewModel model)
        {
            if (ModelState.IsValid)
            {
                var userId = await _accountManager.GetUserIdByNameAsync(User.Identity.Name);

                var themeDto = new ThemeDto
                {
                    UserId = userId,
                    Name   = model.Name
                };

                await _themeManager.CreateAsync(themeDto);

                return(RedirectToAction("Index", "Theme"));
            }

            return(View(model));
        }