Joshua, chapter 8, verses 1 and 2 (with some additional capitalization)

“Then the LORD said to Joshua, ‘Do not be afraid; do not be discouraged. Take the whole army with you and go and attack AI. For I have delivered into your hands the king of AI, his people, his city and his land. You shall do to AI and its king as you did to Jericho and its king.”
(NIV)

Who is the ‘King of AI’?
Are they, or is it, something you follow?