Question: What Kind of logical fallacy is This?

While person B is clearly making an Appeal to Success - without knowing what person A is claiming we cannot know whether B's response is a bona fide deception and not just a braggadocious tirade. While it is indeed a distraction (Red Herring) simply boasting about one's credentials and experience may be delusional, if not, obnoxious, but not necessarily an error in reasoning when considered out of context.