Understanding Http Service?

So. After You Get a Response from GetAsync, What do you do with the info? If it Returns A Table and a number. How could you use it? For example:

table = { ["Ex1"] = false }

Used = 666

How can you use something like that data to make a, lets say a text box. And When The Text is changed. It Looks on the table to check if the word is in the table. Then if it is, and the used isn't 0. Then It gives it something? Then, make the make the Used 665.