How to load a page viewer webpart with user's AD credentials?

Hi,

I am trying to embed a Tableau report into a SharePoint page using a page viewer webpart. SharePoint it is not passing the AD credentials to the iframe and so the user has to authenticate to Tableau and then access the page to recognize who is logged in. 

I tried to deploy the TableauEmbeddedView.wsp solution but still the same results. 

In addition to the above I also tried to add a page viewer into the same page to the tableua report page with the height to 1 px but doing that the users have to hit F5 after they are in the page for the iframe to recognize users AD credentials. 

I am wandering if there is any way via JavaScript or other SharePoint solution that I can use to avoid the user to authenticate to tableau before they access the embed iframe. 

Thanks.