webhooks are not been called

[HelmerBarcos]

Hi Im testing the webhooks functionality of the process endpoint without success.

Steps to reproduce:

1. Call the auth endpoint declared on the postman collection found in the documentation. https://developer.ilovepdf.com/docs/api-reference
2. Call the start endpoint
3. Call the upload endpoint
4. Open https://webhook.site/ and copy the webhook url
5. Add following property to the body object and copy the webhook url

 "webhook" : "my_webhook_url"

Then the webhook should be called by the ilovepdf api but it doesn't.