Ok, just talked to a guy familiar with in-product script. There is not support to do that from the in-product script.
An alternative way is to use our function. Instead of doing it from a script, create a workflow, and call a function. A function can call our REST API. There is an endpoint /orgs/{org_id}/users. A function can get user information from that endpoint.
Thanks,
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Yongjian Feng
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Original Message:
Sent: 03-20-2019 01:05 PM
From: Venkatesh Siddi
Subject: In product scripting - User List
Yes, Scripts feature.
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Venkatesh Siddi
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Original Message:
Sent: 03-20-2019 09:30 AM
From: Yongjian Feng
Subject: In product scripting - User List
Hello Venky,
Thanks for contacting us.
Just to be sure, when you said "product scripting", you are referring to Customization->Scripts, right?

Thanks,
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Yongjian Feng
Software Developer
Resilient IBM