public function show($accountId = null)
    {
        $options = [
        ];

        if (!is_null($accountId)) {
            $options['account_id'] = $accountId;
        }

        return $this->factory->collection(
            $this->client->get(
                "rooms/{$this->roomId}/files",
                $options
            )
        );
    }
public function show($accountId = null)
    {
        $options = [
        ];

        if (!is_null($accountId)) {
            $options['account_id'] = $accountId;
        }

        return $this->factory->collection(
            $this->client->get(
                "rooms/{$this->roomId}/files",
                $options
            )
        );
    }
@param null $accountId

@return CollectionInterface