What is most likely the author's purpose in having Huck reference Mark Twain being the author of "The Adventures of Tom Sawyer" in the first paragraph?

Hey I mean twain wants some credit. Also it was probably irony, most books don't have characters reference the author.

Explanation:

well, there are online sites that can make it look like a texting screenshot, so u can make it like hamilton texting jefferson through that, and he can start with him being like, i know it's out of the blue, but blah blah blah