lib/plugins/aws/provider/awsProvider.js/AwsProvider/enableS3TransferAcceleration
class AwsProvider:  enableS3TransferAcceleration(credentials) {
    this.serverless.cli.log('Using S3 Transfer Acceleration Endpoint...');
    credentials.useAccelerateEndpoint = true;  // eslint-disable-line no-param-reassign
  }