How to use account lock/ unlock feature in WSO2 API Manager 1.6.0

Create new user named testuser. Grant subscriber permission.

Then install required features to APIM 1.6.0 and restarted server

Then locked test user as follows.
Goto claim management UI and make accountLocked to support by default claim


Then go to users and select required user and lock account


I enabled following property in identity-mgt.properties file.
Identity.Listener.Enable=true 

I restarted server to make sure this is not claim cache issue. Now this account is locked and will not be able to use anymore.