post_install() {
    local user='nzbmegasearch'
    local group='nzbmegasearch'
    local desc='NZBmegasearch daemon user'
    local home='/var/lib/nzbmegasearch'
    local shell='/bin/false'

    # Create group if it does not exist
    if ! grep -q "^${group}" /etc/group &> /dev/null
    then
        groupadd -r "$group" &> /dev/null
    fi

    # Create/Update user
    if grep -q "^${user}:" /etc/passwd 2> /dev/null
    then
        usermod -s "$shell" -c "$desc" -d "$home" -g "$group" "$user" &> /dev/null
    else
        useradd -s "$shell" -c "$desc" -d "$home" -g "$group" -r "$user" &> /dev/null
    fi

    chown -R "${user}:${group}" "$home"
}

post_upgrade() {
    post_install $1
}