Hi,
Thank you for reaching out to us. It looks like your developer token is not approved for AdWords / Google Ads API. Is your developer token approved for App conversions and remarketing API or another API? If so, please contact the API Compliance Team here to get your developer token approved for AdWords / Google Ads API. Let me know if you have further questions. I am also redacting your original post, as your post contains sensitive information of your OAuth2 credentials. For your security, please refrain posting sensitive information such as your OAuth2 credentials on the forum.
Thank you,
Bryan, Google Ads API Team