import requests

url = "https://{FUSION HOST}/api/realm-configs/default"

response = requests.get(url)

print(response.json())

[
  {
    "id": "344b8d5b-b822-4d58-881e-ce36101c9296",
    "name": "apikey"
  },
  {
    "id": "realm-okta",
    "name": "realm-okta"
  },
  {
    "id": "a1d0e763-3af0-460c-8638-bb8b8a8fbdb7",
    "name": "native",
    "default": true
  }
]