このエラーメッセージに関する原因と対処に関して説明します。
エラーメッセージ(英語)：
was not able to validate the provided access
対処
関連リンク
AWSコマンドが突然うごかなくなるケースに遭遇 - Qiita
https://qiita.com/aya_eiya/items/a95724b76a30ed76d279
aws-cliがいきなり"AuthFailure" - Qiita
https://qiita.com/iam_nkym/items/7acdd5e67d4a5c9ce6e2
AWS SDKでAuthFailure【cloudpack 大阪 BLOG】 - cloudfishのブログ
http://cloudfish.hatenablog.com/entry/2017/05/14/233710
awscliはOS内の時間が狂ってるとAuthFailureが出る | ハックノート
https://hacknote.jp/archives/13234/
AWS Developer Forums: Setting up AWS CLI - AWS was not able ...
https://forums.aws.amazon.com/thread.jspa?messageID=722197
AWS was not able to validate the provided access ...
https://forums.aws.amazon.com/thread.jspa?messageID=873844
AWS Developer Forums: AWS was not able to validate ...
https://forums.aws.amazon.com/thread.jspa?messageID=825868
AWS Developer Forums: Is IAM supported by Alexa Top ...
https://forums.aws.amazon.com/thread.jspa?messageID=820077&tstart=0
AWS SDKでAuthFailure【cloudpack 大阪 BLOG】 | cloudpack.media
https://cloudpack.media/31076
AWS was not able to validate the provided access credentials ・ Issue ...
https://github.com/ansible/ansible/issues/25459