import requests

url = "https://{FUSION HOST}/api/users"

payload = {
    "username": "<string>",
    "realm": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.json())

{
  "id": "<string>",
  "username": "<string>",
  "realmName": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "roleNames": [
    "<string>"
  ],
  "timezone": "<string>",
  "permissions": [
    {
      "methods": [
        "GET"
      ],
      "path": "<string>",
      "params": {}
    }
  ]
}