Allow user to access application using custom login and AuthenticateAsync

I Created Custom login page, from backend I’m calling AuthenticateAsync method using Okta.Auth.Sdk nuget to authenticate customer.
On the home page we display AppLinks that the user is authorized to access, but each time user clicks on one of the links he gets redirected to okta login page.
my question is can we avoid redirecting customer to the second login since customer is already authenticated?