Power BI - Authentication in App

Hi All, 

We have a power bi report which we would like to embed in an app. App is registered in Azure portal and the report works fine in the app. The problem is when embedding the report in the app users are asked to "sign in" to view the report for authentication purposes. Ideally we want to bypass clicking the sign in. 

Background 

The app that the report is embedded in is based on sharepoint. Therefore when users are asked to "sign in" they are not required to enter credentials per se as we have configured SSO. So the journey is once the main page loads the user is prompted to sign in, they click on the button and the report immediately loads. 

Given that once the user has already authenticated into sharepoint is there a way to automatically authenicate power bi to avoid the sign in step? Or is it possible to configure sharepoint in some way so that the power bi trusts sharepoint authentication and access is granted automatically? 

Thanks