How to use KuCoin in USA?

Hello, I understand that KuCoin is a popular cryptocurrency exchange, but I'm wondering if it's accessible and how to use it in the USA? I've heard some conflicting information about its availability in the US market. Could you please clarify if KuCoin is available for US-based users and provide a step-by-step guide on how to use it, including the registration process, verifying my identity, depositing funds, trading cryptocurrencies, and withdrawing funds? Additionally, are there any restrictions or limitations I should be aware of as a US-based user?