FTP cPanel Username & Password
When transferring large files using FTP, you'll be required to access your cPanel username/password separately. If you don't know these credentials offhand, you can easily access them through your Client Area Portal.
Click on My Accounts on the navigation bar, and select the option to View Details of your domain.
From there, click on the Change Password tab. Although you don't actually have to change your cPanel username & password, they'll be listed at the top of that page.