Step 1:

Login to user control panel, below are respective URL for the same.

User control panel URL: http://<server-ip>:2082 or http://<server-ip>/cpanel

Step 2:

Now click on FTP accounts from the dashboard, as show on the figure below. 

Step 3:

Now click on Create FTP Account. As shown on the figure below.

Step 4:

• Now give the username.
• Select the directory for this account.
• Type the password and confirm the password.
• Now click on Create FTP Account.