No, actually the article claimed the opposite: the attack was likely NOT credential stuffing..
Just stating that you misrepresented what the article actually said when you wrote "the attack is called credential stuffing". Your sentence gives impression that the article would have said it, but the article made a point for the opposite.
Nonetheless, you misrepresented what the article actually said -- the article raised both, the possibility credential stuffing (implied by Amazon spokesperson), and doubt about it (unspecified security expert, WiFi attacks).
The best before date of this conversation has clearly expired, so let's just stop here.