You need to enable an option in the portal extension that allows you to create a shareable view where users bypass the login page and see the shared view directly.
Steps to setup:
Users Table & Login.
Turn off the Require users to log in to use portal toggle.
This configuration will turn your "portal" into a sharable/editable Airtable View. It will show all the records from the table and the logout button is also hidden in this case.
💡Note
The records created in this setup will not be connected to any record from the User table.