How i extract data from a script

[CryptoServices]

Hi everyone, have a short question: So i make a bot for register account on the site " u " lets name it. I make the bot i select randomization for username and password. THEN:

What module i need to use or how do i get the data username:password into a different file , after i succesfully register the account.
Also i want to extract a specific link with a refferal from that account and extract it into a file out from script.

Thanks in advance !