Firebase Cloud Messaging with Node.js - FCM 2

fcm2.js

app.get('/notifications', (req, res) => {
    res.sendFile(__dirname + '/notifcenter.html')
})

app.post('/store', (req, res) => {
  
    MongoClient.connect(url, (err, db) => {
        if (err) throw err
        else {
            db.collection('tokens').insertOne(req.body, (err, body) => {
                if (err) throw err
                res.sendStatus(200)
            })
        }
        db.close()
    })
})