services.AddAuthentication(options =>
{
 options.DefaultAuthenticateScheme = CookieAuthenticationDefaults.AuthenticationScheme;
 options.DefaultChallengeScheme = CookieAuthenticationDefaults.AuthenticationScheme;
}).AddCookie();

app.UseAuthentication();

var claimsIdentity = new ClaimsIdentity(new Claim[] { new Claim(ClaimTypes.Name, model.Email) }, "Basic");
var claimsPrincipal = new ClaimsPrincipal(claimsIdentity);
await HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,
 claimsPrincipal);