Default authentication flow should fail if invalid profile name is passed

[gdavison]

Documentation

• I've gone though the API reference
• I've checked AWS Forums and StackOverflow for answers
• I've searched for previous similar issues and didn't find any solution

Describe the bug

When the default authentication flow is used with config.LoadDefaultConfig(), providing an invalid profile name, either with config.WithSharedConfigProfile() or by setting AWS_PROFILE, does not cause an error, but falls back to trying IMDS.

Expected behavior

In the AWS CLI, I get

$ AWS_PROFILE=no-such-profile aws sts get-caller-identity

The config profile (no-such-profile) could not be found

The SDK should fail with a config.SharedConfigProfileNotExistError error.

Current behavior

The AWS SDK falls back to calling IMDS

Steps to Reproduce

cfg, err := config.LoadDefaultConfig(ctx)

and set AWS_PROFILE to an invalid profile name

or

cfg, err := config.LoadDefaultConfig(ctx, config.WithSharedConfigProfile("no-such-profile"))

Possible Solution

No response

AWS Go SDK version used

github.com/aws/aws-sdk-go-v2 v1.13.0, github.com/aws/aws-sdk-go-v2/config v1.13.1

Compiler and Version used

go version go1.17.2 darwin/amd64

Operating System and version

N/A

[vudh1]

closing since PR is merged.

[github-actions]

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