Update Wordpress with command line

wp_update.sh

#!/bin/bash
source /etc/hestiacp/hestia.conf
source $HESTIA/func/main.sh

for user in $($BIN/v-list-users plain | cut -f1 ); do
    for domain in $($BIN/v-list-web-domains $user plain | cut  -f1); do
        echo "Webdomain: $domain"
        if [ -f "/home/$user/web/$domain/public_html/wp-config.php" ]; then
            cd  /home/$user/web/$domain/public_html/
            user_exec /usr/bin/wp core update   
        fi
    done
done

one line 5 it should be

for user in $($BIN/v-list-users plain | cut -f1 ); do