Node SDK auth broke - migrate from service account to OAuth server-to-server creds
If your pdfservices-node-sdk calls die after the service-account deprecation, migrate to OAuth server-to-server credentials - build them with the service principal credentials builder using just your client ID and client secret, replacing the old five-field service account JSON. Update the SDK code to the new builder at the same time - the old builder path will not pick up the new credential type. Follow the current Node quickstart on the Adobe developer docs for the exact call shape.
Context: Stack Overflow 76502945 (accepted answer): the Node SDK's old service-account credentials suddenly stopped working, and Adobe was migrating users to server-to-server auth. The accepted answer clarifies it is OAuth server-to-server (not Auth0), and it is simpler - two credentials instead of five.Maintainer review
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