Just a quick one: The s3 adaptor doesn’t list all the possible regions anymore - works fine if you add them in the config https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html

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Regions and Availability Zones - Amazon Relational Database Service
Protect your application from the failure of a single location by using AWS Regions and Availability Zones in data center facilities around the world.