Any way to pull out session key from access token returned by Facebook iOS SDK?

I still don't have the formula to convert FBAppAuth-ed or SafariAuth-ed access_token fragments to session_id. However, the following description will help in getting an access_token in described formula which can then be easily fragmented to derive session_id. Hope this helps.

In iOS SDK Version 2, login is handled by following API in Facebook class.

Current FB access token has following format ('|' is a delimiter): || For example, for a access_token like this: 146012674543599|de29194522ad43g16ec2ca9b-612345672|kK5HvfSTbJx-x21rMsTyttifij0 Session Key is : de29194522ad43g16ec2ca9b-612345672.

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