User not authenticating on successful login ASP.net - asp.net

Question

I created a application using ASP.NET with EF. I did the login function and when the user logged redirect to WelcomePage. The login was succeeded and redirect to the page but in the page I have the user authenticated.
I put this to see and its false
<p>#User.Identity.IsAuthenticated</p>
I'm just having trouble understanding how to authenticate them. I try to clean cache but thats not the problem.
Startup.cs
public void ConfigureServices(IServiceCollection services)
{
string Con = ConUri();
services.AddDbContext<SysContext>(options =>
{
options.UseNpgsql(Con);
});
services.AddIdentity<User, IdentityRole<Guid>>()
.AddEntityFrameworkStores<SysContext>()
.AddDefaultTokenProviders();
services.AddControllersWithViews().AddRazorRuntimeCompilation();
services.AddControllersWithViews().AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);
services.AddDistributedMemoryCache();
services.AddSession(options =>
{
options.IdleTimeout = TimeSpan.FromDays(30);
options.Cookie.HttpOnly = true;
});
services.ConfigureApplicationCookie(options =>
{
options.AccessDeniedPath = new PathString("/Login");
options.LoginPath = new PathString("/Login");
});
}
HomeController.cs
public object Login(String Username, String Password)
{
try
{
if (ModelState.IsValid)
{
var user = _userManager.FindByEmailAsync(Username).Result;
if (user == null)
throw new Exception("Error 1");
var result = _signInManager.CheckPasswordSignInAsync(user,
Password, lockoutOnFailure: false).Result;
if (result.IsLockedOut)
throw new Exception("Error 2");
if (!result.Succeeded)
throw new Exception("Error 3");
var response = _signInManager.PasswordSignInAsync(Username, Password, true, lockoutOnFailure: false).Result;
if (result.Succeeded)
{
var location = new Uri($"{Request.Scheme}://{Request.Host}/WelcomePage");
Response.Cookies.Append("_UserId", user.Id.ToString());
HttpContext.Session.SetString("_User" + user.Id, string.Empty);
return new
{
Sucesso = true,
Url = location
};
}
else
{
throw new Exception("Error ex");
}
}
throw new Exception("Error 4");
}
catch (Exception ex)
{
return new
{
Sucesso = false,
Mensagem = ex.Message
};
}
}
}

Answer 1

You could check the EmailConfirmed Colum if it has a value in your database,if you did not set to send you a confirmed e-mail when you sign up,try to set as below to avoid varify the e-mail:
services.Configure<IdentityOptions>(options =>
{
.......
options.SignIn.RequireConfirmedAccount=false ;
......
})
Why you passed the username as an e-mail address?
var user = _userManager.FindByEmailAsync(Username).Result;