&nbsp;<code><a href="HttpAuthenticationMechanism.html#validateRequest(jakarta.servlet.http.HttpServletRequest,jakarta.servlet.http.HttpServletResponse,jakarta.security.enterprise.authentication.mechanism.http.HttpMessageContext)">HttpAuthenticationMechanism</a></code></span></div>
<div class="block">Authenticate an HTTP request.
 
 <p>
 This method is called in response to an HTTP client request for a resource, and is always invoked 
 <strong>before</strong> any <code>Filter</code> or <code>HttpServlet</cod