I've saved variables like AuthToken into the App::Persistence store, but I want to debug it. Can I access this through the REPL console?
Absolutely. App::Persistence["AuthToken"]
will work just fine in the REPL.
If you want to get all the contents of the persistent store, try App::Persistence.storage.dictionaryRepresentation
. Look for the keys that begin with your app identifier (com.yourcompany.Appname_
).