public async Task <IActionResult> ManageUserClaims(UserClaimsVeiwModel model, string userID)
        {
            var user = await userManager.FindByIdAsync(model.UserId);

            if (user == null)
            {
                ViewBag.ErrorMessage = $"User with Id = {model.UserId} cannot be found";
                return(View("NotFound"));
            }
            var claims = await userManager.GetClaimsAsync(user);

            var result = await userManager.RemoveClaimsAsync(user, claims);

            if (!result.Succeeded)
            {
                ModelState.AddModelError("", "Cannot remove user existing claims");
                return(View(model));
            }
            result = await userManager.AddClaimsAsync(user, model.Claims
                                                      .Select(c => new Claim(c.ClaimType, c.IsSelected?"true":"false")));

            if (!result.Succeeded)
            {
                ModelState.AddModelError("", "Cannot add selected claims to user");
                return(View(model));
            }


            return(RedirectToAction("EditUser", new { Id = model.UserId }));
        }
        public async Task <IActionResult> ManageUserClaims(string userId)
        {
            var user = await userManager.FindByIdAsync(userId);

            if (user == null)
            {
                ViewBag.ErrorMessage = $"User with Id = {userId} cannot be found";
                return(View("NotFound"));
            }
            var existingUserClaim = await userManager.GetClaimsAsync(user);

            var model = new UserClaimsVeiwModel
            {
                UserId = userId
            };

            foreach (Claim claim in ClaimsStore.AllClaims)
            {
                UserClaim userClaim = new UserClaim
                {
                    ClaimType = claim.Type
                };
                if (existingUserClaim.Any(C => C.Type == claim.Type && C.Value == "true"))
                {
                    userClaim.IsSelected = true;
                }
                model.Claims.Add(userClaim);
            }

            return(View(model));
        }