How to get Token Size?

I have been tasked with getting the exact token size for a list of user
accounts.

I have downloaded and tested the tokensz utility. It will provide a list of
groups for a user credential but it will not provide a token size count for
any credential but the one I am running it with.

Are there any methods for getting the token size report with this utility
without asking the users to run it for me?

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