gl-store-s3.js/lib/aws.js

const AWS = require("aws-sdk");
AWS.config.setPromisesDependency(Promise);

module.exports = options => {
  AWS.config.update({ region: options.bucketRegion });
  if (options.accessKeyId != null && options.secretAccessKey != null) {
    AWS.config.update({
      credentials: new AWS.Credentials({
        accessKeyId: options.accessKeyId,
        secretAccessKey: options.secretAccessKey
      })
    });
  }
};