*/
public interface SsoAuthenticator {

    /**
     * Gets the login credential for SSO authentication.
     * @return The login credential.
     */
    LoginCredential getLoginCredential();

    /**
     * Resolves credential using the provided resolver.
     * @param resolver The login credential resolver.
     */
    void resolveCredential(LoginCredentialResolver resolver);

    /**

     *         or no credential could be obtained
     */
    public LoginCredential getLoginCredential() {
        if (available()) {
            final SsoAuthenticator authenticator = getAuthenticator();
            if (authenticator != null) {
                return authenticator.getLoginCredential();
            }
        }
        return null;
    }

    /**

                return redirect(RootAction.class);
            });
        }
        final SsoManager ssoManager = ComponentUtil.getSsoManager();
        final LoginCredential loginCredential = ssoManager.getLoginCredential();
        if (loginCredential == null) {
            if (ssoManager.available()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("SSO is available but no user found.");