Simple Lambda function that displays `Hello, ${name}`

handler.js

'use strict';

module.exports.hello = (event, context, callback) => {

  let user = 'User';
  if(event.queryStringParameters.name) {
    user = event.queryStringParameters.name
  } 

  const response = {
    statusCode: 200,
    body: JSON.stringify({
      message: `Hello, ${user}`,
    }),
  };

  callback(null, response);
};