def read_creds_from_ec2_instance_metadata():
    """
    Read credentials from EC2 instance metadata (IAM role)

    :return:
    """
    creds = init_creds()
    try:
        has_role = requests.get('http://169.254.169.254/latest/meta-data/iam/security-credentials', timeout = 1)
        if has_role.status_code == 200:
            iam_role = has_role.text
            credentials = requests.get('http://169.254.169.254/latest/meta-data/iam/security-credentials/%s/' %
                                       iam_role.strip()).json()
            for c in ['AccessKeyId', 'SecretAccessKey']:
                creds[c] = credentials[c]
            creds['SessionToken'] = credentials['Token']
        return creds
    except Exception as e:
        return False