public async Task <ActionResult> ConfigureUserToRole(int userId, string role)
 {
     if (ModelState.IsValid)
     {
         try
         {
             bool result = _identityManager.AssignRoleToUser(userId, role, await _identityManager.GetLoggedInUserIdAsync());
             if (result == false)
             {
                 throw new ArgumentNullException("Cannot assign role to the user");
             }
         }
         catch (Exception ex)
         {
             throw ex;
         }
     }
     return(RedirectToAction(nameof(SearchUserRoles)));
 }