Json Web Token verification

After setting up my worker's route I got a message say I need to verify my JWT. I did this after setting up my same origin domain settings. I don't under don't understand what the JWT is Authorizing in this case. I also don't understand where to paste the code in the attached file. I initially pasted it in my worker's script but I got the errors found in attachment #1. Furter, where do I paste the "AUD" and "JWK" strings?
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