Default / override region is not added to the config

[viraptor]

Output of aws-sso version:

AWS SSO CLI Version 1.9.10 -- Copyright 2021-2022 Aaron Turner
unknown (nixpkgs) built at unknown

Describe the bug:
The configuration for the default region does not seem to be applied to the aws config.

To Reproduce:
Current config:

SSOConfig:
  Default:
    SSORegion: us-east-1
    StartUrl: ...
    DefaultRegion: us-east-1
    Accounts:
      "718...":
        DefaultRegion: eu-west-1
DefaultRegion: us-east-1
...

Config generated with aws-sso config-profiles does not include the default region settings.
aws-vault exec ... -- aws ec2 complains about missing AWS_REGION.

Expected behavior:
Expected the region = ... setting to be added to my generated .aws/config.yaml file.

Desktop (please complete the following information):

• OS: macOS / nixpkgs
• Version Ventura / nixpkgs-23.05

Additional context:
Add any other context about the problem here.

[synfinatic]

DefaultRegion is for $AWS_DEFAULT_REGION https://github.com/synfinatic/aws-sso-cli/blob/main/docs/config.md#defaultregion

Sadly, different AWS SDK's use different ENV variables, because why have 1 standard when 2 will do?

[viraptor]

It doesn't seem to work either way. With config as above, I run:

aws-vault exec role-in-718... -- env | grep AWS

And there's no AWS_DEFAULT_REGION available.

[viraptor]

I guess I'm saying the equivalent to ConfigVariables per-role would be good to have, the same way we have DefaultRegion available per-account and per-role right now.

[synfinatic]

Uh, the command is aws-sso not aws-vault? aws-vault is a different program. :)

[synfinatic]

$ set | grep REGION


$ aws-sso eval --profile View | grep REGION
export AWS_SSO_DEFAULT_REGION="us-west-2"
export AWS_DEFAULT_REGION="us-west-2"

[viraptor]

Correct. aws-sso exec works just fine. But the regions could be configured in the .aws/config as well, which is used by other apps - since the setting already exists in aws-sso's config.