Thanks for replying. That link only takes me to the Apple ID sign in page, with the error "Your Apple ID isn't enabled for iTunes Connect." However I'm not looking to retail content through iTunes, rather I'm wanting to release apps in the App Store.

Some additional info, I went back to https://appstoreconnect.apple.com/ and this message appeared: "To access App Store Connect, you must be an individual or team member in the Apple Developer Program, or invited by an individual to access their content in App Store Connect. Learn More" However I understand that we're already enrolled for App Store Connect though our Apple ID.