Need To keep Authentication On for everytime

Hi we have power Bi Report server with url ex. https//powerbi-demo.com:443/Reports

It is public URL and its open for everyone in our company. We want to make sure that only limited users can login into this URL.

Currently its windows authentication so everyone can login into this URL without passing credential.

Can anyone help with this problem so we want to enable authentication for everyuser everytime?

If user is not allowed to login into this power Bi report server URL. It will tell user that you are not authorized to login this URL. Contact Administrator.

Can anyone help with this feature to enable authentication for everytime for everyuser in normal browser not in private/incognito mode.

Thanks in advance