import requests

url = "https://platform.ankra.app/org/helm/credentials/{credential_name}"

payload = {
    "username": "<string>",
    "password": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "errors": []
}