What does 1 Kings 21:20 mean?

Ahab said to Elijah, 'So, you found me, my enemy.' Elijah replied, 'Yeah, I found you, because you sold yourself to do what God hates.' 1 Kings 21:20 - Modern Text Bible

(Ahab sees Elijah as his enemy because Elijah always brings bad news. Elijah calls out Ahab for giving himself over to evil.)