Cloudflare DynDNS API - Updating Cloudflare DynDNS with Synology Dynamic IP

Heres a script I use to update my Domain DNS Records to point to my Synology NAS dynamic ip adress.

#!/usr/bin/env bash
DOMAIN="mydomain.com"
SYNOLOGY_ID=""
 
# get zone id from cloudflare dashboard
ZONE_ID=""
# get cloudlare creds from here
# https://developers.cloudflare.com/fundamentals/api/get-started/create-token/ 
CLOUDFLARE_EMAIL=""
CLOUDFLARE_API_KEY=""
 
if [ "$(hostname)" = "NAS_USERNAME" ]; then
  # when run as a script on my NAS
  echo internal
  IP="$(curl ifconfig.me)"
else
  # when run externally 
  echo external
  IP="$(dig +short "$SYNOLOGY_ID".synology.me)"
fi
 
echo "IP: $IP"
 
cloudflare_update_dyndns() {
  curl https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/$DNS_RECORD_ID \
    -X PATCH \
    -H 'Content-Type: application/json' \
    -H "X-Auth-Email: $CLOUDFLARE_EMAIL" \
    -H "X-Auth-Key: $CLOUDFLARE_API_KEY" \
    -d '{
      "name":"'"$RECORD_NAME"'",
      "ttl": 3600,
      "type": "A",
      "comment": "DynDNS IP",
      "content":"'"$IP"'",
      "proxied": true
    }'
  echo
}
 
# get dns record id for *, www, and the root domain
# curl -X GET "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records?name=$RECORD_NAME" \
# 	-H "X-Auth-Email: $CLOUDFLARE_EMAIL" \
# 	-H "X-Auth-Key: $CLOUDFLARE_API_KEY" \
# 	-H "Content-Type: application/json"
 
RECORD_NAME="$DOMAIN"
DNS_RECORD_ID=""
cloudflare_update_dyndns
 
RECORD_NAME="www.$DOMAIN"
DNS_RECORD_ID=""
cloudflare_update_dyndns
 
RECORD_NAME="*.$DOMAIN"
DNS_RECORD_ID=""
cloudflare_update_dyndns