Use the AWS API Access Key to login the AWS Web Console via the Federation Sign in.

aws_federation_signin_with_api_access_key.py

import requests, json, sys, urllib

try:
    import boto3
    import botocore.config
    import requests
except ModuleNotFoundError:
    print("Don't forget to install boto3 and requests.")
    sys.exit(1)

AWS_REGION = "us-east-1"
AWS_ACCESS_KEY_ID = ""
AWS_ACCESS_KEY_SECRET = ""

FEDERATION_NAME = "Rilakkuma"

botocore_config = botocore.config.Config(
    region_name=AWS_REGION,
    user_agent="Debian",
)

boto3_session = boto3.session.Session(
    region_name="us-east-1",
    aws_access_key_id=AWS_ACCESS_KEY_ID,
    aws_secret_access_key=AWS_ACCESS_KEY_SECRET,
)

sts = boto3_session.client("sts", config=botocore_config)

sts_federation_response = sts.get_federation_token(
    Name=FEDERATION_NAME,
    Policy=json.dumps({"Version": "2012-10-17", "Statement": [{"Effect": "Allow", "Action": "*", "Resource": "*"}]})
)

sts_federation_credentials = sts_federation_response["Credentials"]

_params = {
    "Action": "getSigninToken",
    "SessionType": "json",
    "Session": json.dumps({
        "sessionId": sts_federation_credentials["AccessKeyId"],
        "sessionKey": sts_federation_credentials["SecretAccessKey"],
        "sessionToken": sts_federation_credentials["SessionToken"]
    })
}

federation_signin_token = requests.get("https://signin.aws.amazon.com/federation", params=_params).json()["SigninToken"]

_params = {
    "Action": "login",
    "Issuer": FEDERATION_NAME,
    "Destination": "https://console.aws.amazon.com/console/home",
    "SigninToken": federation_signin_token
}

signin_url = "https://signin.aws.amazon.com/federation?" + urllib.parse.urlencode(_params)

print("Signin Url:\n{0}".format(signin_url))