private static boolean isLogoutRequest(final Optional<ClientCredential> clientCredential) {
        return clientCredential.isPresent() && !clientCredential.get().getCredentials().isForAuthentication();
    }
This class represents an action to put at the beginning of the webflow.
<p>
Before any authentication, redirection urls are computed for the different clients defined as well as the theme,
locale, method and service are saved into the web session.</p>
After authentication, appropriate information are expected on this callback url to finish the authentication
process with the provider.

@author Jerome Leleu
@since 3.5.0
support/cas-server-support-pac4j-webflow/src/main/java/org/apereo/cas/web/flow/actions/DelegatedClientAuthenticationAction.java