After your DUNS number is activated please enroll in the Apple Developer program as an Organization.
note: It is critical you enroll with the "Entity Type" of "Organization" as this is what allows you to add zingfit to your dev team
An Apple developer account costs an annual fee of $99.
Sign in using your Apple ID and Password and follow the steps to enroll.
It usually takes 2-3 weeks for Apple to approve a new Developer Account.