OAuth Token is Missing (discord.js)

API
2

Your headers are wrong.

        headers: {
            'cliend_id': config.twitchClientID,
            'client_secret': config.twitchClientSecret,
            'token_type': 'bearer'
        },

The Twitch Clietn Secret is NOT to be used in this way

You need to use the ClientID and Secret to generate an App Access Token, and use that