Retrieve all posts from a profile.

def get_posts(self) -> Iterator[Post]:
        """Retrieve all posts from a profile."""
        self._obtain_metadata()
        yield from (Post(self._context, node, self) for node in
                    self._context.graphql_node_list("472f257a40c653c64c666ce877d59d2b",
                                                    {'id': self.userid},
                                                    'https://www.instagram.com/{0}/'.format(self.username),
                                                    lambda d: d['data']['user']['edge_owner_to_timeline_media'],
                                                    self._rhx_gis,
                                                    self._metadata('edge_owner_to_timeline_media')))