services.AddIdentity<ApplicationUser, IdentityRole>()
                 .AddDefaultUI()
                 .AddTokenProvider<EmailConfirmationTokenProvider<ApplicationUser>>("emailconfirmation")
                 .AddDefaultTokenProviders()
                 .AddEntityFrameworkStores<ApplicationDbContext>();

services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie();
.....
services.ConfigureApplicationCookie(options =>
            {
                options.AccessDeniedPath = "/Identity/Account/AccessDenied";
                options.Cookie.Name = ".AspNetCore.Cookies";
                options.Cookie.HttpOnly = true;
                options.ExpireTimeSpan = TimeSpan.FromMinutes(60);
                options.LoginPath = "/Identity/Account/Login";                
                options.ReturnUrlParameter = CookieAuthenticationDefaults.ReturnUrlParameter;
                options.SlidingExpiration = false;
            });

app.UseAuthentication();
app.UseAuthorization();