func (a *Args) Validate() error {
	req, err := http.NewRequest(http.MethodPost, a.URL.String(), bytes.NewReader([]byte("")))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	if a.AuthToken != "" {
		req.Header.Set("Authorization", a.AuthToken)
	}

	client := &http.Client{Transport: a.Transport}
	resp, err := client.Do(req)
	if err != nil {
		return err

	return map[arn.ARN]string{
		o.args.RoleARN: o.args.RolePolicy,
	}
}

// checkConnectivity returns true if we are able to connect to the plugin
// service.
func (o *AuthNPlugin) checkConnectivity(ctx context.Context) bool {
	ctx, cancel := context.WithTimeout(ctx, healthCheckTimeout)
	defer cancel()
	u := url.URL(*o.args.URL)