Please go to LinkedIn Apps page https://www.linkedin.com/secure/developer?newapp= , create an application, and in the line 548 set the client_id to Consumer key and client_secret with Consumer secret. The Callback URL must be https://hismarty.com/index.php?route=extension/module/tmdsociallogin/likinredirect Make sure you enable the necessary permissions to execute the API calls your application needs.