def _prime_user_perm_caches(self):
        """
        Prime both the user and group caches and put them on the ``self.user``.
        In addition add a cache filled flag on ``self.user``.
        """
        perm_cache, group_perm_cache = self._get_user_cached_perms()
        self.user._authority_perm_cache = perm_cache
        self.user._authority_group_perm_cache = group_perm_cache
        self.user._authority_perm_cache_filled = True
Prime both the user and group caches and put them on the ``self.user``.
        In addition add a cache filled flag on ``self.user``.