public ActionResult StudentLogin(LoginViewModel model, string returnUrl)
        {
            var objUtilities         = new Utilities.Utilities();
            var validateStudentLogin = objUtilities.ValidateStudentLogin(model);

            if (validateStudentLogin)
            {
                var currentStudentId = objUtilities.FetchStudentId(model.Username);
                return(RedirectToAction("StudentHome", "Home", new { studentId = currentStudentId }));
            }
            ModelState.AddModelError("", "Invalid login attempt.");
            return(View(model));
        }