When you choose ACME-DNS as the DNS provider in the LetsEncrypt SSL dialog what goes into the dns_acmedns_registration_file?

[vonHabsi]

When you select ACME-DNS after choosing a certificate based on DNS-01 challenge
the Credentials File Content * asks you to provide two parameters.

dns_acmedns_api_url = http://acmedns-server/
dns_acmedns_registration_file = /data/acme-registration.json

What should be the contents of /data/acme-registration.json in this case?

Do the settings vary from provider to provider, or is there a common minimum set all proivders must require?

In this case Dreamhost is the provider.