As Chinthan said, in Personas 2.0 it is not possible to do what you are looking for. However if automation is your goal, perhaps this can help:
If you want to automatically allow all users to access Personas, I can imagine creating a group based on a PFCG role that all users have, then automate this program to run daily. This would pick up the list of all users and assign the role RENDER_ONLY to them, for instance.