def post_revert(self, post_id, version_id):
        """Function to reverts a post to a previous version (Requires login).

        Parameters:
            post_id (int):
            version_id (int): The post version id to revert to.
        """
        return self._get('posts/{0}/revert.json'.format(post_id),
                         {'version_id': version_id}, 'PUT', auth=True)