"""Amazon STS connector."""

import boto3

sts_client = None


def get_sts_client():
    """Connect to STS.

    Connect to STS via fargate task role.

    Returns:
          botocore.client.STS : Client object provides access to sts.
    """
    global sts_client
    if not sts_client:
        sts_client = boto3.client('sts')
    return sts_client