since there is a default defined in default_pipeline_environment.
I believe there is a misunderstanding. The check checks if there is a valid defined for the
credentials id key. Since there is one definded in the default config this check will always
succeed.
This check does not check if there is a credential defined with this id via the Jenkins
Credentials Plugin. Maybe when this check was provided this was the intention. There is a
speaking error message provided by the credentials plugin in case the credentials lookup
fails.
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