Path to a file containing the Cloudflare API authentication token. The file content should be in the format CLOUDFLARE_API_TOKEN=YOUR_SECRET_TOKEN. The service user needs read access to this file. Ensure permissions are secure (e.g., 0400 or 0440) and ownership is appropriate Using CLOUDFLARE_API_TOKEN is preferred over the deprecated CF_API_TOKEN.

"/run/secrets/cloudflare-ddns-token"