fix(cli): doesn't support plugins that return initially empty credentials

[rix0rrr]

Plugins that return V2 credentials objects, return credentials that are self-refreshing. Those credentials can start out empty, which is perfectly valid.

We shouldn't reject them if they are.

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

The pull request linter has failed. See the aws-cdk-automation comment below for failure reasons. If you believe this pull request should receive an exemption, please comment and provide a justification.

A comment requesting an exemption should contain the text Exemption Request. Additionally, if clarification is needed add Clarification Request to a comment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.80%. Comparing base (e8d8237) to head (ad1112d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32552   +/-   ##
=======================================
  Coverage   78.80%   78.80%           
=======================================
  Files         108      108           
  Lines        7159     7159           
  Branches     1319     1319           
=======================================
  Hits         5642     5642           
  Misses       1332     1332           
  Partials      185      185           

Flag	Coverage Δ
suite.unit	78.80% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	78.80% <100.00%> (ø)

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: ad1112d
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[github-actions]

Comments on closed issues and PRs are hard for our team to see.
If you need help, please open a new issue that references this one.