ASP.NET core, change default redirect for unauthorized

Question

I am attempting to redirect to a different login url in ASP.NET MVC6

My account controller login method has a Route attribute to change the url.

Answer 1

If you check UseIdentity extension method here you will notice that it is using IdentityOptions not CookieAuthenticationOptions, so instead you must configure IdentityOptions:

services.Configure<IdentityOptions>(opt =>
{
    opt.Cookies.ApplicationCookie.LoginPath = new PathString("/login");
});

Edit

For asp.net core 2.0: Identity cookie options are no longer part of IdentityOptions. Check mxmissile's answer.