To create new / additional FTP accounts; first log into your user account with us and then:
a) Login to your account
b) Select 'My Hosting Accounts' on the left hand side
c) On the right of the domain name under 'Tools', click on the first icon 
. This will take you to your cPanel.
A new tab will open in your browser and you will be logged into your cPanel hosting account.
Once you are the in cPanel hosting account, look for the tool 'FTP Accounts' and create the user from this page. Please note that if the user you are creating is required to have access to some specific folder / path only then please ensure to add the desired path next to 'Directory' while creating this user.