Blazor Server Authentication Without EF Core

Hey guys, I'm searching to solve a problem

I'm developing a Blazor Web App with server global interactivity and i want to handle the authentication and authorization.

I would like to do it with a cookie to make it permanent and secure.

The only solution i found is with the external package Blazored or identity with EF core.

But i wouldn't use an external package and database

The authentication will be done by an external database with api connection.

I'm developing we the .net 8 preview. 

I don't find a lot of useful documentation, do you have any suggestions?