If you need to see who has accessed your site with FTP, you can view this information in the raw access log files for your website.
You can download these log files from the cPanel Raw Access Logs screen. FTP logs will include ftp_log in the filename.
Important: Before you can access these logs, you must navigate to the Raw Access Logs interface and select Archive logs in your home directory at the end of each stats run. The logs will be available after the system processes them.