You must be logged into the VPS server either
Connecting to a VPS server with remote desktop connection. (Windows)
Select Start at the bottom left
Choose Accounts
Select Other Users and on the right Add someone else to this PC
Choose Users
Right-click New User...
Write
User name
Full name
Description
Password
Confirm password
Remove the top dot, User must change password at next logo, so you don't have to enter a new password the next time you log in.
Then just Create
And Close