Auth_providers and DuckDNS

Hi everybody, I’m trying to setup the new authentication system but I cannot understand how to mix it with DuckDNS.

Now what I have is the following;

  
home_assistant:    
  auth_providers:
    - type: homeassistant

http:
  api_password: !secret pw_duckdns
  base_url: !secret url_duckdns
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem

but I cannot understand how to link the two things. Maybe it’s a simple thing but I can’t get it.
Thx