gar_shiny_getUrl.RdNeeded for the redirect URL in Google Auth flow
gar_shiny_getUrl(session)
| session | The shiny session object.  | 
    
|---|
The URL of the Shiny App its called from.
Other shiny auth functions: authReturnCode,
  createCode,
  gar_shiny_getAuthUrl,
  gar_shiny_getToken,
  loginOutput,
  reactiveAccessToken,
  renderLogin,
  revokeEventObserver,
  with_shiny