#### Enable Successful/Unsuccessful Authentication Attempts Logging
By default, successful/unsuccessful authentication attempts are NOT logged. This is due to the fact that logging can severely decrease REST performance. To enable logging of successful/unsuccessful REST attempts, issue the following command:
-karaf> log:set DEBUG AuthenticationListener
+karaf> log:set DEBUG org.opendaylight.aaa.shiro.filters.AuthenticationListener
It is possible to add custom AuthenticationListener(s) to the Shiro based configuration, allowing different ways to listen for successful/unsuccessful authentication attempts. Custom AuthenticationListener(s) must implement the org.apache.shiro.authc.AuthenticationListener interface.