@filipe23353816 I cannot answer authoritatively as I don't know your code well. However, it does sound that you are right. Service Account (JWT) credentials use bearer tokens and not basic authentication.
I think another reasonable tell would be the domain name of the API calls made with the `Authorization: Basic XXXX' header. If the calls are not going to https://ims-na1.adobelogin.com/ims/token/ , then you can certainly skip them as they are not impacted by this migration.
Hope this helps.
Thanks
Manik