Hiding user list from others

I have a scenario where we want to use Dynamic View for external people to access Smartsheet. However if we had them as a group anyone in our account can view them and its not just locked to Group Admin users only.

I found this link below for some instructions on how to hide a user list:

I can't seem to follow the instruction exactly and was hoping for assistance on how we can make this work .

Any assistance would be appreciated.

Answers