This sample code is for use with tutorials on the AWS Mobile SDK blog
Android: https://mobile.awsblog.com/post/Tx15RSS024YGKUL/Adding-Web-Identity-Federation-with-Facebook-to-Android-Projects
iOS: http://mobile.awsblog.com/post/Tx1P67OUG61P9CB/Adding-Web-Identity-Federation-with-Facebook-to-iOS-Projects