Exim plugin does not work in 14.6.0 archetype based on the documentation

If you install the exim plugin (version 4.0.1) in a 14.6.0 archetype it’s not working. 

When executing the following command: curl -i -u admin:admin http://localhost:8080/cms/ws/exim/ps you get a 403

The demo project works, that’s based on 14.0.0-2. 

The reason is that on node: /hippo:configuration/hippo:groups/admin the property hippos:members doesn’t have the value ‘admin’. By adding that value it works in the 14.6.0 version.

I’m not sure if that’s the right way or that the plugin needs to be updated...