const updateAmount = (req, res) => {
    let result;

    mongoose.connect(mongourl,options)
    .then(async ()=>{
        result=await bar.find({ name: req.body.name }, (err,result) => {
            if (err)
                throw err;
                console.log(`this is result: \n ${result}`);
                console.log('name:'+req);
                res.end('done');
        });
    })
    .catch(err => {
        console.error('some error occurred', err)
        res.end(err.message);
    })


};