Asp.Net Identity Login Not working properly

Question

I created a Login and Register page in asp.net using Identity. I wanna log in using email and password. But when I give it an email it searches in the UserName column in th Asp.netUsers table.

my controller

namespace GRIDevelopment.UI.Controllers { public class AccountController : Controller { private readonly UserManager _userManager; private readonly SignInManager _signInManager;

    public AccountController(UserManager<IdentityUser> userManager,
                                  SignInManager<IdentityUser> signInManager)
    {
        _userManager = userManager;
        _signInManager = signInManager;
    }
    public IActionResult Index()
    {
        return View();
    }

    public IActionResult Register()
    {
        return View();
    }

    [HttpPost]
    public async Task<IActionResult> Register(RegisterModel model)
    {
        if (ModelState.IsValid)
        {
            var user = new IdentityUser
            {
                UserName = model.UserName,
                Email = model.Email,
            };

            var result = await _userManager.CreateAsync(user, model.Password);

            if (result.Succeeded)
            {
                await _signInManager.SignInAsync(user, isPersistent: false);

                return RedirectToAction("index", "Home");
            }

            foreach (var error in result.Errors)
            {
                ModelState.AddModelError("", error.Description);
            }

            ModelState.AddModelError(string.Empty, "Invalid Register Attempt");

        }
        return View(model);
    }

    [HttpGet]
    [AllowAnonymous]
    public IActionResult Login()
    {
        return View();
    }
    [HttpPost]
    [AllowAnonymous]
    public async Task<IActionResult> Login(LoginModel user)
    {
        if (ModelState.IsValid)
        {
            var result = await _signInManager.PasswordSignInAsync(user.Email, user.Password,user.RememberMe, false);

            if (result.Succeeded)
            {
                return RedirectToAction("Index", "Home");
            }

            ModelState.AddModelError(string.Empty, "Invalid Login Attempt");

        }
        return View(user);
    
    }

    public async Task<IActionResult> Logout()
    {
        await _signInManager.SignOutAsync();

        return RedirectToAction("Login");
    }
}