public function unfollowPlaylist($userId, $playlistId)
{
$headers = $this->authHeaders();
$headers['Content-Type'] = 'application/json';
$uri = '/v1/users/' . $userId . '/playlists/' . $playlistId . '/followers';
$this->lastResponse = $this->request->api('DELETE', $uri, [], $headers);
return $this->lastResponse['status'] == 200;
}