message: Updated Cognito Provider list-user-pools code example
diff: * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0.
  */
  +
  use aws_sdk_cognitoidentityprovider::{Client, Config, Error, Region, PKG_VERSION};
  use aws_types::region;
  use aws_types::region::ProvideRegion;
  