Authentication, SSO, and Microsoft Graph in Microsoft Teams Tabs: An End-To-End Tutorial

Are you working with the AAD team to ensure that a similar approach can be used with future libraries? 

In MSAL (v0.1.3), the getCachedToken() method is declared as private, so I am using acquireTokenSilent(). However, if acquireTokenSilent() is called in the Teams tab, it fails silently. (The official Teams documentation discusses the requirement that auth pages cannot run inside an IFRAME.) If I call acquireTokenSilent() using the prescribed microsoftTeams.authentication.authenticate() method, it works. However, the pop-up dialog is briefly shown.