Archlinux - LVM on LUKS - Reset Password

Boot into a live usb

fdisk -l to find your encrypted partition

cryptsetup open /dev/nvme1np2 to decrypt the partition and show the logical volumes

mount /dev/VolGroup/root /mnt mount's the root folder's logical volume (assuming you followed mine/the archwiki's default naming scheme)

arch-chroot /mnt root into the mounted root partition

passwd user change the password.