After reviewing the Vault audit logs, it was clear that SDC was correctly handling the authenticatin process. In my case, the Vault policy applied to the streamsets-dev app-id did not provide access to the correct secret path.
After reviewing the Vault audit logs, it was clear that SDC was correctly handling the authenticatin authentication process. In my case, the Vault policy applied to the streamsets-dev app-id did not provide access to the correct secret path.