Promisify is not a function - node.js

Question

I am working on lex and I am trying to store user data in DynamoDB while using NodeJS
Here is my code:
'use strict';
const uuidV1 = require('uuid/v1');
const AWS = require('aws-sdk');
const promisify = require('es6-promisify');
const dynamo = new AWS.DynamoDB.DocumentClient();
module.exports.saveBookingToDatabase = function(Arrival_city, Departure_city, Flight_type, Phone_number){
console.log('saveBookingToDatabase');
const item = {};
item.bookingId = uuidV1();
item.arrivalCity = Arrival_city;
item.departureCity = Departure_city;
item.classType = Flight_type;
item.phone = Phone_number;
const params = {
TableName: 'airstallion',
Item: item
};
const putAsync = promisify(dynamo.put, dynamo);
return putAsync(params).then(() => {
console.log(`Saving ticket ${JSON.stringify(item)}`);
return item;
})
.catch(error => {
Promise.reject(error);
});
}
When i run the program is returning the following error

Answer 1

Since aws-sdk library supports promise, its not necessary to use es6-promisify library. Using node.js async/await we shall achieve the same use case.
'use strict';
const uuidV1 = require('uuid/v1');
const AWS = require('aws-sdk');
const dynamo = new AWS.DynamoDB.DocumentClient();
module.exports.saveBookingToDatabase = async function(Arrival_city, Departure_city, Flight_type, Phone_number){
console.log('saveBookingToDatabase');
const item = {};
item.bookingId = uuidV1();
item.arrivalCity = Arrival_city;
item.departureCity = Departure_city;
item.classType = Flight_type;
item.phone = Phone_number;
const params = {
TableName: 'airstallion',
Item: item
};
try {
let result = await dynamo.put(params)
console.log(`Saving ticket ${JSON.stringify(item)}`);
return item;
} catch(e) {
throw (e)
}
}