Check out the samples on the CNS website, you'll find a basic file that has an FTP table.
Copy the table and paste it into your solution. Every record is a possible account, so it's up to you to decide whether you want a different account for each User or 1 single account for all Users.
There is also a page on creating a single Account process which does not require the use of a table.
The account details could effectively be stored in a variable, at the start of the FTP script process.
Unfortunately, the CNS documentation is scattered and assumes you have read every page on the site, functions, knowledge base...