create_support_user.sh

#! /usr/bin/env sh

USERNAME="support"
AVATAR_URL="https://shevchuk.co/cog.png"
AVATAR_FILE="/home/$USERNAME/.face"

sudo adduser --uid 555 --gecos "" $USERNAME
sudo adduser $USERNAME sudo
sudo wget -qO $AVATAR_FILE $AVATAR_URL
sudo chown $USERNAME:$USERNAME $AVATAR_FILE
sudo tee /var/lib/AccountsService/users/support << EOF > /dev/null
[User]
Icon=$AVATAR_FILE
SystemAccount=true
EOF