Groovy script to list credentials associated with jobs

[s...@stubrown.uk.net]

Hi 

Ive been trying to understand how I can get a list of credentials associated with each job in a Jenkins instance via a groovy script but I'm struggling.

I can get certain properties, but I can't work out out to list credentials name, we are using a mixture of free style builds, pipelines and also multi branch

Any advice would be appreciated, thanks 

Stu