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Antoine Pitrou authored and GitHub committed b34f9dfb40d
ARROW-16864: [Python] Allow omitting S3 external_id and session_name with role_arn (#13455) Both external_id and session_name are optional parameters when an Assume Role authentication is requested, but omitting them would raise an error. Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: Antoine Pitrou <antoine@python.org>