I've loaded the WC1 API postman collection and all of my requests return 401 Unauthorized. I turned on the interceptor ON. What else could be wrong?
For access to the World-Check One API, there is no username and password needed, that is part of your registration to the WC1 product. For the API you should have received your Registration Keys, the api-key and api-secret keys can be found the the Postman Environment, select Manage Environment (on the WC1 Pilot environment pulldown). You will see the keys, copy and paste them along with your group-id in a private email to me (firstname.lastname@example.org) and I'll verify your API credentials have been setup.
Let me know if you have any more questions.