aws_iam_user control fails when IAM user does not exist

[arielr-lt]

I'm trying to test whether my functional IAM user exists on my AWS accounts, I noticed that when the IAM user doesn't exist the control throws an error instead of just reporting as a failed control.

Describe the problem

Versions:

• inspec: 5.18.14
• inspec-aws: 1.83.53
• OS: windows 11 / WSL2 (Debian)

I'm expecting this control:

describe aws_iam_user('my-aws-iam-user') do
    it { should exist }
end

to return below message when it doesn't actually exist

 ×  is expected to exist
...
Test Summary: 0 successful, 1 failures, 0 skipped

But instead I'm receiving this output:

 inspec exec lt-aws-profile -t aws://
[2022-12-23T09:25:51-03:00] WARN: AWS Service Error encountered running a control with Resource aws_iam_user. Error message: The user with name my-aws-iam-user cannot be found.. You should address this error to ensure your controls are behaving as expected.

Profile:   AWS InSpec Profile (lt-aws-profile)
Version:   0.1.0
Target:    aws://
Target ID: 0e766696-fc0b-5900-8def-279a5a75c984

  AWS IAM User 
     ↺  undefined method `arn' for nil:NilClass

Profile:   Amazon Web Services Resource Pack (inspec-aws)
Version:   1.83.53
Target:    aws://
Target ID: 0e766696-fc0b-5900-8def-279a5a75c984

     No tests executed.

Test Summary: 0 successful, 0 failures, 1 skipped

As you can see you can easily reproduce the problem by just specifying any IAM user you know in advance it doesn't exist in your AWS account.

Possible Solution

N/A