i want to take backup of odoo database i write following code but nor my folder is created or backup is executed please guide me in above issue.Thanks in advance.

#!/bin/bash

# vars
BACKUP_DIR=~/odoo_backups
ODOO_DATABASE=crm
ADMIN_PASSWORD=

# create a backup directory
mkdir -p bkup

# create a backup
curl -X POST \
-F "master_pwd=$ root" \
-F "name=${crm}" \
-F "backup_format=zip" \
-o bkup.date + %F.zip \
http://localhost:8069/web/database/backup

crontab -e