How do I find the number of users logged on another server?

I'm trying to ping other servers and find the number of users logged on that server. Any leads?

Do you need maybe something like this?
FINGER(1) UNIX Reference Manual
NAME
finger - user information lookup program
SYNOPSIS
finger [-lmMspho] [user ...] [user@host ...]
DESCRIPTION
The finger utility displays information about the system users.

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