With Credly Social Management, developers can manage relationships between users from groups, memberships and affiliations in other sites. Since Credly is a service that authenticates digital badges, the function Contact List of this API could be particularly beneficial to aggregate and update lists of contacts who want be identified with professional certifications. This deal helps consumers to display badges in communities and associations. Partners who intent to organize long lists of class rosters could value this API because it assists to create new directories, manage feeds and retrieve follower information. Registration is recommended to test endpoints for authentication.