async function listAudio(req: Request, res: Response) { const audioResources = await req.watsonSTT.listAudio(); if (audioResources[0]) { req.log.error( `failed to list audio: ${JSON.stringify(audioResources[0], null, 2)}`); return res.status(500).json({ error: audioResources[0].error || 'failed to list audio' }); } else { return res.status(200).json({ audio: audioResources[1].audio }); } }