backstage/.changeset/olive-geese-chew.md

@backstage/backend-common, @backstage/integration

@backstage/backend-common	@backstage/integration
patch	patch

Support external ID when assuming roles in S3 integration

In order to assume a role created by a 3rd party as external ID is needed. This change adds an optional field to the s3 integration configuration and consumes that in the AwsS3UrlReader.