.js

'use strict';
const AWS = require('aws-sdk')

module.exports.setProvisionedConcurrency = async event => {
  const params = {
    FunctionName: 'MyFunctionName',
    ProvisionedConcurrentExecutions: '5',
    Qualifier: 'aliasname'
  };
  const lambda = new AWS
  lambda.putProvisionedConcurrencyConfig(params, function(err, data) {
    if (err) console.log(err, err.stack); // an error occurred
    else     console.log(data);           // successful response
  });
};