User Activity

I've set up a webhook to listen for in-app purchases, but it does not seem to work with test users. Is this by design, or some kind of error? If by design, it would be incredibly useful to have test user purchases also trigger the webhook. I couldn't...
I have successfully set up and verified a webhook endpoint as described in the docs, but upon receiving Event Notification requests, I am stuck at the step of validating the payload. The documentation says the process is as follows (source):We sign a...
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