If you have multiple users who require access to your web space folders and files, it is recommended that you create FTP users. However, you can also use your main FTP login to connect to the FTP server which are as below:
FTP username: same with your cPanel username login
FTP hostname: your domain name
FTP password: same with your cPanel password
Where to find the FTP credentials?
Step 1. Log in to your cPanel with your username and password.
Step 2. Under Files panel, click FTP Accounts.
Step 3. Your credentials can be found under FTP Accounts and Special FTP Accounts.