try{
String userName=request.getParameter("userName");
String password=request.getParameter("password");
String role=request.getParameter("role");
if(!role.equals("ADMIN") && !role.equals("USER") && !role.equals("FEE"))
throw new UnableToRegisterException();
this.userRegister(userName, password, role);
return new ModelAndView("redirect:addUserPage.htm");
}
catch (NullPointerException e) {