Allow: This user can interact with behaviors, exclusively own actors, be a target for attached actors, and can be
sent dialogs. Deny: Interactions with behaviors will not be sent back to the app server. Attempts to create
exclusive actors for this user will fail. Actors attached to this user will be considered unattached. Calls
to user.prompt will be rejected. If the user-tracking permission is also denied, this client will not join
a user to the session at all.
Grants access to a persistent user identity across sessions. Needed for things like high scores lists or
persistent settings. Allow: This user will be uniquely identified to this MRE origin across sessions and
instances. Deny: This user will be assigned a new ID every time they connect to MREs from this origin.
If the user-interaction permission is also denied, this client will not join a user to the session at all.
The set of permissions MREs can request from users, and users can grant.