FreeBSD google cloud image / set password auto for root etc

i want to use FreeBSD intro google cloud but i can't make the password work. Sorry for my bad english.

Soo , i have this shell script for create image :

VERSION=10.3-RELEASE
VMSIZE=10g
SWAPSIZE=1G
NEWFS_OPTIONS="-U -j -t"
COMPONENTS="base keel"

TS=`env TZ=UTC date +%Y%m%d%H%M%S`
IMAGENAME=`echo FreeBSD-${VERSION}-i386-${TS} | tr '[A-Z]' '[a-z]' | sed -e 's/.//g'`

BUCKETFILE=FreeBSD-${VERSION}-i386-${TS}.tar.gz
TMPFILE=FreeBSD-${VERSION}-i386-gcloud-image-${TS}.raw

WRKDIR=${PWD}
TMPMOUNT=/mnt/gcloud_new_${TS}

###############################

cleanup() {
  set +e
  echo "Error or interrupt detected, cleaning up and exiting"
  cd ${WRKDIR}
  umount -f ${TMPMOUNT} >/dev/null 2>&1
  rmdir ${TMPMOUNT} >/dev/null 2>&1
  mdconfig -d -u ${MD_UNIT} >/dev/null 2>&1
  rm -f ${TMPFILE} disk.raw pmbr gptboot /tmp/mkimg-?????? >/dev/null 2>&1
  trap - SIGHUP SIGINT SIGTERM EXIT
  echo
  exit 1
}

build_mirror() {
  cd ${WRKDIR}
  mkdir -p ${VERSION}
  cd ${VERSION}

  for comp in ${COMPONENTS} ; do
    if [ ! -f ${comp}.txz ]; then
      fetch http://ftp.freebsd.org/pub/FreeBSD/releases/i386/i386/${VERSION}/${comp}.txz
    fi
  done
}

build_image() {
  cd ${WRKDIR}
  truncate -s ${VMSIZE} ${TMPFILE}
  MD_UNIT=$(mdconfig -f ${TMPFILE})

  echo "  Creating filesystem"
  newfs ${NEWFS_OPTIONS} ${MD_UNIT} >/dev/null 2>&1

  mkdir -p ${TMPMOUNT}

  mount /dev/${MD_UNIT} ${TMPMOUNT}

  cd ${TMPMOUNT}
  for comp in ${COMPONENTS} ; do
    echo "  Installing ${comp} into image"
    tar -xzf ${WRKDIR}/${VERSION}/${comp}.txz
  done
}

setup_image() {
cd ${TMPMOUNT}
chroot . usr/sbin/pw unlock root

echo "ssh_service::0:0::::/usr/share/games/Ira::tEst" | adduser -f -

  cat << EOF > etc/resolv.conf
search google.inteal
nameserver 8.8.4.4
nameserver 8.8.8.8
EOF

  cat << EOF > etc/fstab
# Custom /etc/fstab for FreeBSD VM images
/dev/gpt/rootfs   /       ufs     rw      1       1
/dev/gpt/swapfs   none    swap    sw      0       0
EOF

  cat << EOF > etc/rc.conf
hostname="Ira"
ifconfig_vtnet0="SYNCDHCP mtu 1460"
ntpd_sync_on_start="YES"
sshd_enable="YES"
EOF

  cat << EOF > boot/loader.conf
autoboot_delay="-1"
beastie_disable="YES"
loader_logo="none"
hw.memtest.tests="0"
console="comconsole"
hw.vtnet.mq_disable=1
ke.timecounter.hardware=ACPI-safe
aesni_load="YES"
nvme_load="YES"
EOF

  cat << EOF >> etc/hosts
169.254.169.254 metadata.google.inteal metadata
EOF

  cat << EOF > etc/ntp.conf
server metadata.google.inteal iburst

restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery

restrict 127.0.0.1
restrict -6 ::1
restrict 127.127.1.0
EOF

  cat << EOF >> etc/syslog.conf
*.err;ke.waing;auth.notice;mail.crit                /dev/console
EOF

  cat << EOF >> etc/ssh/sshd_config
ChallengeResponseAuthentication no
X11Forwarding no
AcceptEnv LANG
Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
AllowAgentForwarding no
PermitRootLogin yes
PasswordAuthentication yes
ChallengeResponseAuthentication yes
ClientAliveInterval 420
EOF

  cat << EOF >> etc/crontab
0   3   *   *   *   root    /usr/sbin/freebsd-update cron
EOF

  cat << EOF >> etc/sysctl.conf
net.inet.icmp.drop_redirect=1
net.inet.ip.redirect=0
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1
ke.ipc.somaxconn=1024
debug.trace_on_panic=1
debug.debugger_on_panic=0
EOF

    sed -E -i '' 's/^([^#].*[[:space:]])on/1off/' etc/ttys 
    touch ./firstboot
}

finish_image() {
  cd ${TMPMOUNT}
  cp boot/pmbr ${WRKDIR}
  cp boot/gptboot ${WRKDIR}

  cd ${WRKDIR}

  umount ${TMPMOUNT}
  rmdir ${TMPMOUNT}

  mdconfig -d -u ${MD_UNIT}

  echo "  Creating partitioned file"
  mkimg -s gpt -b pmbr 
          -p freebsd-boot/bootfs:=gptboot 
          -p freebsd-swap/swapfs::${SWAPSIZE} 
          -p freebsd-ufs/rootfs:=${TMPFILE} 
          -o disk.raw

  rm ${TMPFILE} pmbr gptboot
  echo "  Creating image tar"
  tar --format=gnutar -Szcf ${BUCKETFILE} disk.raw
  rm disk.raw
}

###############################

if [ $(id -u) != 0 ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

set -e

trap cleanup SIGHUP SIGINT SIGTERM EXIT

cd ${WRKDIR}

echo "Building mirror of OS components"
build_mirror
echo "Creating image"
build_image
echo "Setting up image"
setup_image
echo "Finishing image"
finish_image
trap - SIGHUP SIGINT SIGTERM EXIT

All is fine, all working perfect. But one issue, i don't want to install all google packages and that things. I want a clean and fresh install then i will configure myself what i need. After i install intro google cloud when i try to login with winscp it says AccesDenied wrong password. My question is.. How i can change this script to make a image with password for root already set? How i can change this shell script to make a new user and new password ? Do you guys have some ideea wich password will assign? Based on this shell script with actual codes wich password will assign for root? I just need to auto set root password or to know wich password will set.

thanks

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