Using Field Alias

Using Field Alias

hello,

I want to use alias to pre-fill some of the fields Form that send automatically after within Zoho campaign after user registration.

I don't  know how to set the url that the fields will pre-fill in with the right data of each registered user.

If that user name is "Ran" the pre-fill field should to pull the name "Ran" from "first name" field and if the user name is "Gogo"  the pre-fill field should to pull the name "Gogo" from "first name" field.

The same goes for the email field

What is the way to do it?

Thanks