Ensure user's email is stored in user_context as their private role name

    def role_names(self) -> Set[str]:

        """The set of role names of this user."""

        user = self.trans.user

        return {ura.role.name for ura in user.roles} if user else set()

        role_names = set()

        if user:

            role_names = {ura.role.name for ura in user.roles}

            role_names.add(user.email)  # User's private role may have a generic name, so add user's email explicitly.

        return role_names

    @property

    def group_names(self) -> Set[str]: