Millisecond Forums

We are putting an Inquisit study on Turk Prime. We entered the URL for the study into its own survey. When in Sandbox mode we are able to start and finish the Inquisit survey. When it finishes, the page with the "Secret Key" comes up as well as a way to enter the URL to get a code if one doesn't pop up (pictured below). Where do participants enter this key and how does it get linked to them? 



Thank you!