title: Custom Authentication in PowerBI
body: <p>I'm looking a solution to combine Power BI authentication and a web application.
  We authenticate our users using existing web application and let them see the dashboard and reports in Power BI portal, the existing users are external customers who don't have internal AD accounts.</p>
  
  <p>Following solution will redirect user to a login page always.
  <a href="https://github.com/Microsoft/Reporting-Services/tree/master/CustomSecuritySample" rel="noreferrer">https://github.com/Microsoft/Reporting-Services/tree/master/CustomSecuritySample</a></p>
  
  <p>But what I need is that once the user has been authenticated using our web application, Power BI let the users see the dashboards without any more authentication.</p>