public ActionResult AssignToProject(string userId, int projectId)
        {
            var user    = db.Users.Find(userId);
            var project = db.Projects.Find(projectId);

            ph.CheckUserId(user.Id);
            if (!ph.isUserOnProject(userId, projectId))
            {
                ph.assignToProject(userId, projectId);
            }
            return(RedirectToAction("Index"));
        }