you can use trusted authentication. It gives you advantage of licenses. But you won't be able to allow row level security.
If your requirement is - You have a dashboard which you want to give access to all the users visiting that particular webpage and you are not on a core based license.
Trusted Authentication - Tableau will help you achieve the same. Follow steps
2) Add a user in tableau server and give him the access to dashboard
3) Create html code as said in Test Trusted Authentication - Tableau
3) Test the access from web browser
Session should remain same as your ticket generation.
Hope it helps
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