Smartthings integration - Help Needed

Hello,
I’m trying to setup interrogation with Smartthings with running into problems with hass.io.

  1. Installed duckdns add-on
{
  "lets_encrypt": {
    "accept_terms": true,
    "certfile": "fullchain.pem",
    "keyfile": "privkey.pem"
  },
  "token": "sdfj-2131023-dslfjsd-12321",
  "domains": ["my-domain.duckdns.org"],
  "seconds": 300
}
  1. Logged into duckdns and created an entry (xxx.duckdns.org)

  2. I created a personal token on the Samsung site

  3. Setup port forwarding on my router

  4. Edited my configuration.yaml and added the following:

http:
  base_url: https://my-domain.duckdns.org:8123
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem

I rebooted and now I can’t get to the HA web page and having problems troubleshooting the problem. For example: How can i edit the configuration.yaml from the HA console?

Also - What step did I miss in the Smartthings integration process?

Update: Got everything working. Did not realize after adding these lines that you need to use https://x.x.x.x to login to HA.

http:
  base_url: https://my-domain.duckdns.org:8123
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem