app.post('/api/tts', (req, res) => {
    let payload = '';

    req.on('data', chunk => {
        payload += chunk;
    });

    req.on('end', () => {
        textToSpeech.request(payload, (data) => {
            const respString = data.toString('base64');
            const base64String = `data:audio/mpeg;base64,${respString}`
            res.send(base64String);
        });
    });
});