Establish connection to AWS service.

def conn_aws(cred, crid):
    """Establish connection to AWS service."""
    driver = get_driver(Provider.EC2)
    try:
        aws_obj = driver(cred['aws_access_key_id'],
                         cred['aws_secret_access_key'],
                         region=cred['aws_default_region'])
    except SSLError as e:
        abort_err("\r SSL Error with AWS: {}".format(e))
    except InvalidCredsError as e:
        abort_err("\r Error with AWS Credentials: {}".format(e))
    return {crid: aws_obj}