I have a web mapping application that, in the feature popups, have links to an external ArcGIS for Javascript API developed webpage (PHP) that uses the feature layer to create a map, showing only that specific feature, along with the attributes for that feature. Is there a way to pass the log in credentials for AGO so that users who are already logged in using the web mapping application do not have to log in again when they open up this separate page? I have seen a few examples (embedded iframes, etc) but I haven't discovered a solution for this type of setup.
