Asp.Net Identity stopped authenticating after changing the String Id to Int

I'm developing a system using AspNet Identity, I decided to change the primary key type of string to int, so far so good, the application is registering the right user, but when I log in is not authenticating the user, also no error, just returns to Home Index, without logging in the user, does anyone know why this happens?

Login Method:

 [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, change to shouldLockout: true
        var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: true);
        switch (result)
        {
            case SignInStatus.Success:
                return RedirectToLocal(returnUrl);
            case SignInStatus.LockedOut:
                return View("Lockout");
            case SignInStatus.RequiresVerification:
                return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
            case SignInStatus.Failure:
            default:
                ModelState.AddModelError("", "Login ou Senha incorretos.");
                return View(model);
        }
    }

This Result returns as Sucess

Redirection after the switch:

private ActionResult RedirectToLocal(string returnUrl)
    {
        if (Url.IsLocalUrl(returnUrl))
        {
            return Redirect(returnUrl);
        }
        return RedirectToAction("Index", "Home");
    }

And then it falls into this method where If's is always true:

 protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (_userManager != null)
            {
                _userManager.Dispose();
                _userManager = null;
            }

            if (_signInManager != null)
            {
                _signInManager.Dispose();
                _signInManager = null;
            }
        }

        base.Dispose(disposing);
    }

Back to my login screen without authentication: