ASP.NET MVC Login by email instead of username - asp.net-mvc

Question

I try to create new project with MVC 5 and OWIN by "Individial User Accounts". The problem is when I register a new account, the system requires me input an email then that email will be populated to both Email and Username in database.
When I try to login, the system asks me to input the email but it compares that email with column Username. So the values of Email and Username are the same. The login code below is in action Login (Account Controller)
var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
Is there any ways to compare the inputted email with the Email column instead of Username?

Answer 1

To answer:
Is there any ways to compare the inputted email with the Email column instead of Username?
This is probably not the best answer but the SignInManager should have access to UserManager which has a Users property.
So you could lookup the user based on the email and then using the result call the signin method.
Something like this (untested):
var user = SignInManager.UserManage.Users.Where(u => u.email == model.Email).FirstOrDefault();
var result = await SignInManager.PasswordSignInAsync(user.UserName, model.Password, model.RememberMe, shouldLockout: false);
You would want to check that the user was populated otherwise return invalid login details error. Same as if PasswordSignInAsync failed.

Answer 2

Here is what to do as #ChrisMoutray suggested, find the username for the email provided and log in. I put it here.
Instantiate usermanager and signinmanager
private readonly SignInManager<ApplicationUser> signInManager;
private readonly UserManager<ApplicationUser> userManager;
public AccountController(SignInManager<ApplicationUser> signInManager, UserManager<ApplicationUser> userManager)
{
this.signInManager = signInManager;
this.userManager = userManager;
}
and then in the Login (post) task:
var user = await userManager.FindByEmailAsync(model.Email);
var result = await signInManager.PasswordSignInAsync(user.UserName, model.Password, model.RememberMe, lockoutOnFailure: false);
PS. Found myself in this old post so just adding a working solution.

Answer 3

The reason is because when you register. you get username = email.
public async Task<ActionResult> Register(RegisterViewModel model)
{
if (ModelState.IsValid)
{
var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
var result = await UserManager.CreateAsync(user, model.Password);