case 'POST':
							var data = '';
							req.on('data', function (part) {
								data += part;
							}).on('end', function () {
								var arg = JSON.parse(data);
								console.log(arg);
								accounts.findOne({_id: ObjectId("000000000000000000000001")}, function (err, konto) {
									accounts.findOneAndUpdate({_id: ObjectId("000000000000000000000001")}, {$set: {balance: konto.balance + arg.kwota}}, function (err, op) {
										accounts.findOne({_id: ObjectId("000000000000000000000001")}, function (err, updated_account) {
											rep.writeHead(200, 'OK', {'Content-type': 'application/json'});
											rep.end(JSON.stringify(updated_account));
										});
									});
								});

							});
							break;