User Account locking\unlocking audit logs not coming in WSO2 5.3.0 audit.log

Question

Account locking\unlocking audit logs not coming in WSO2 5.3.0 audit.log. I tried below scenarios and didn't see any corresponding log in audit.log file: 1.Make 3 incorrect login attempts 2. Wait for 5 minutes ( keep user account idle ) 3. Lock the User account from Wso2 Portal(admin account) 4. UnLock the User Account from Wso2 Portal(admin account)