effect of default region when running aws configure in a CloudShell session

Based on a quick check of my own environment, I think CloudShell sets the AWS_DEFAULT_REGION environment variable, which will override a value in a configuration file (as written by aws configure).

You can check where it's getting the value for the region from with aws configure list. If it's the environment variable, you can override it with export AWS_DEFAULT_REGION=..., or clear it (so it should use the config file) with unset AWS_DEFAULT_REGION.

aws configure list is an interesting detail. It showed that it takes the value from AWS_REGION, I did not know that variable exists. Thank you!