Rest assured, you won't lose your account on some random accusation by this guy.
Something like that happened to me recently. I paused playing chess for some years and only came back recently. So I've lost a game to some guy and in the rematch I played much better because I got into it again, revived my previous knowledge of chess. He accused me of using an engine because of this improvement in my second game.
I just laughed and took it as a compliment to my game play.
Hahaha
send an opponent that says this , the link to cc cheat detection , and then wish them good luck and good chess in their future games