The writer of the article uses no source. Not saying nothing in it is true; but sources are needed to fully verify everything stated.
I reckon the source is Giuliani's testimony to the Jan 6 House committee.
However, for anyone who paid attention to Giuliani’s testimony to Nancy Pelosi’s Jan. 6 House committee, which he repeated in greater detail behind closed doors to special counsel Jack Smith, Powell was in bad odor with both Trump and Giuliani from the minute she started jabbering about Krakens, which Giuliani told the then-president was “crazy s–t.”