Use more well-known jwt package

[BabakAmini]

@sijokun thanks for maintaining this repo. I'm aware that this is an async version of the original repository, and you might not be keen to modify some basic dependencies. But I hope you use more well-known packages like Autlib, which are JWT-verified, in favor of the jwt package used by the original repository. jwt does not seem to be maintained anymore, and this could pose security problems.