public IActionResult ManageUsers(string searchText)
        {
            if (!string.IsNullOrEmpty(searchText))
            {
                var result = this.searchServices.GetResultOfSearch(searchText, User);
                var users  = result.UsersFound.Users.ToList();
                var usersFoundToPromoteDemote = new PromoteDemoteViewModel()
                {
                    AdminUsers    = administrationServices.GetAdminUsers(User, users),
                    NonAdminUsers = administrationServices.GetNonAdminUsers(User, users),
                    AllUsers      = this.userServices.GetAllUsernames()
                };

                return(View(usersFoundToPromoteDemote));
            }

            var usersToPromoteDemote = new PromoteDemoteViewModel
            {
                AdminUsers    = administrationServices.GetAdminUsers(User),
                NonAdminUsers = administrationServices.GetNonAdminUsers(User),
                AllUsers      = this.userServices.GetAllUsernames()
            };

            return(View(usersToPromoteDemote));
        }