Registrants tab : Registrants table does not display registrants details

Registrants tab : Registrants table does not display registrants details https://beta-community-app.topcoder.com/challenges/adb02d6f-dcc6-4fcc-b7a4-a16c7d173839?tab=registrants API ref issue: https://github.com/topcoder-platform/resources-api/issues/31 <img width="1440" alt="Screenshot 2020-06-15 at 12 41 56 PM" src="https://user-images.githubusercontent.com/58783823/84628127-b8e60100-af05-11ea-81f4-bff82698b99c.png">

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/community-app/issues/4537