Lastly, add who you want to be the key manager in "
_keyManagers (address)". If you want this to remain as you, enter your wallet address here. The key manager is the address that can transfer or burn the NFT, so by setting this address to be you, you prevent the person that you grant it to from transfering or cancelling it. If you put their address, they will be able transfer it or cancel it as if they had bought it themselves (they may get a refund, unless you changed the cancellation settings).