Calling Cognito Token endpoint

test.py

token_url="https://myapp.auth.us-east-1.amazoncognito.com/oauth2/token"
message = bytes(f"{client_id}:{client_secret}",'utf-8')
secret_hash = base64.b64encode(message).decode()
payload = {
    "grant_type": 'authorization_code',
    "client_id": client_id,
    "code": code,
    "redirect_uri": redirect_uri
}
headers = {"Content-Type": "application/x-www-form-urlencoded",
            "Authorization": f"Basic {secret_hash}"}
           
resp = requests.post(token_url, params=payload, headers=headers)