Who to connect in filezilla with provided ftp credentials ?

Hello,
From my client I received ftp account and sample listing, that credentials are valid:

ubuntu@ip-CLIENT_IP:~$   ftp CLIENT.REMOTE.SERVER Connected to CLIENT.REMOTE.SERVER. 220 ProFTPD Server (ProFTPD) [CLIENT.SERVER.IP] Name (CLIENT.REMOTE.SERVER:ubuntu): SERVERUSER 331 Password required for SERVERUSER Password: 230 User SERVERUSER logged in Remote system type is UNIX. Using binary mode to transfer files. ftp> ls 200 PORT command successful 150 Opening BINARY mode data connection...
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Who to connect in filezilla with provided ftp credentials ?