Nginx - Configuring the default SSL Cloudflare token

I’m utilizing the Nginx Reverse Proxy application and Cloudflare to maintain remote access to certain apps on my TrueNAS server. For the SSL certificate, Nginx currently uses the following:

dns_cloudflare_api_token=0123456789abcdef0123456789abcdef01234567

I’d like to change the token to the one that was generated by Cloudflare to make it easier to add SSL certificates in the future. Is there a .conf file that holds these defaults?