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)：
ssm access denied
対処
関連リンク
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https://docs.aws.amazon.com/ja_jp/systems-manager/latest/userguide/sysman-paramstore-access.html
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https://stackoverflow.com/questions/44734572/assumed-role-in-aws-lambda-access-denied-on-ssm-call
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