def METHOD_NAME():
    return ibm_boto3.client(
        's3',
        ibm_api_key_id=os.environ['COS_API_KEY_ID'],
        ibm_service_instance_id=os.environ['COS_INSTANCE_CRN'],
        endpoint_url=os.environ['COS_ENDPOINT'],
        config=Config(signature_version='oauth'),
    )