GIMP 2.10.28: Configuring CloudExport Plugin for Test Credentials

Goal

Validate the new CloudExport plugin in GIMP 2.10.28 without exposing or using the production API key.

Context

The CloudExport plugin, added in the 2.10.28 release, authenticates via an API key supplied in the gimp-cloudexport.conf file. The default endpoint points to the production service, and the plugin does not provide a built‑in toggle for a sandbox environment.

Constraints

Production credentials must remain confidential, and the test image must be processed through the same authentication flow that the production workflow uses.

Questions

• Is there a supported method to inject a test API key into the CloudExport plugin without modifying the source code?
• Does the plugin allow overriding the target endpoint to a sandbox URL via configuration or environment variable?
• What is the recommended approach to isolate test traffic from production while using the same authentication mechanism?