In order not to duplicate the email and username in the database, instead of the any command in SQL, I used is unique in the index section. Now, if a duplicate is entered, it throws an InnerException error. Now, how do I display this error to the user for both the email and the username?

`

 public bool IsExistUserName(string userName)
    {
        return _context.Users.Any(u => u.UserName == userName);
    }

    public bool IsExistEmail(string email)
    {
        return _context.Users.Any(u => u.Email == email);
    }

//

 public IActionResult Register(RegisterViewModel register)
    {
        if (!ModelState.IsValid)
        {
            return View(register);
        }

        if (_userService.IsExistUserName(register.UserName))
        {
            ModelState.AddModelError("UserName", "You have already registered with this username");
            return View(register);
        }

        if (_userService.IsExistEmail(register.Email.Trim().ToLower()))
        {
            ModelState.AddModelError("Email", "You have already registered with this email");
            return View(register);
        }
        User user = new User
        {
            UserName = register.UserName,
            Email = register.Email.Trim().ToLower(),
            Password = HashPassword.EncodePasswordMd5(register.Password),
            ActiveCode = Guid.NewGuid().ToString().Replace("-", ""),
            IsActive = false,
            RegisterDate = DateTime.Now,

        };
        _userService.AddUser(user);
        return View("SuccsesRegister", user);
    }

`

Output: