Publish link for authorized user and give the API session

Hi everyone, I just started to review this and I found almost impossible.

I want to publish a Dashboard, but only for authorized users (Security is very important), so then I want to load that Dashboard in an iframe. But how I can give the security to bypass the login?

I'm looking in the API (python, nodejs, c#) and reading in the documentation, but I didn't find a way to give a token or something to the url to Auto login and display the dashboard.

Someone know if this is possible?