I've never used wit.ai, can you give me a rundown of how it works? I usually use spacy.io, where it instantiates an NLP on your local machine.
PS: Should your config.py have the access token?
wit.ai is easy to use. You provide some example queries and manually classify training data. Now, every query you give to it returns probabilities of the categories it may belong to. Rinse and repeat.
It provides two tokens; I've included the client side token. :)