public override string[] GetRolesForUser(string user_name)
 {
     using (ClothesEntities db = new ClothesEntities())
     {
         var useraccount = db.Users.FirstOrDefault(x => x.UserName == user_name);
         if (useraccount == null)
         {
             return(null);
         }
         else
         {
             string[] listQuyen = useraccount.UserRoles.Select(x => x.Role.RoleName).ToArray();
             return(listQuyen);
         }
     }
 }