Thanks @Oli_Clark. TBH, I have tried every formula in the functions. There is no function for extensively manipulating or transforming JSON in function libraries. I already tried STRING, UTILITY, OBJECT, ARRAY, pretty much everything there.
So to reproduce my experience, search for ‘Set item to storage’ and ‘Get item from storage’ in the Flow Function Market and install. Then set a random string to storage with any Key of your choice. Next use the same Key to get the item from storage. When it returns, it’s no longer a string but a JSON type. You are not able to add it to say appVars.randomString which stores only string. See what I mean. Now there are no tools that allow you much like you would use schema to extract the string you want in the Data tool.
Finally, if anyone can point me to how I might persist a user token in Appgyver without banging my head against the wall will be very much appreciated.