Create the encryption key with random
sudo dd if=/dev/random of=/media/usb_with_keys/macbookpro.key bs=1 count=32
sudo zfs create timemachine/jason/macbookpro \
-o mountpoint=/mnt/timemachine/jason/macbookpro \
-o compression=on \
-o quota=1T \
-o encryption=aes-256-gcm \
-o keyformat=raw \
-o keylocation=file:///media/usb_with_keys/macbookpro.key