protected boolean setAuthentication(final HttpServletRequest request, final HttpServletResponse response,
            final Authentication authentication) {
        try {
            if (this.authenticationManager != null) {
                DelegatingNegotiateSecurityFilter.LOGGER.debug("Delegating to custom authenticationmanager");
                final Authentication customAuthentication = this.authenticationManager.authenticate(authentication);
                SecurityContextHolder.getContext().setAuthentication(customAuthentication);
            }
            if (this.authenticationSuccessHandler != null) {
                try {
                    this.authenticationSuccessHandler.onAuthenticationSuccess(request, response, authentication);
                } catch (final IOException | ServletException e) {
                    DelegatingNegotiateSecurityFilter.LOGGER.warn("Error calling authenticationSuccessHandler: {}",
                            e.getMessage());
                    DelegatingNegotiateSecurityFilter.LOGGER.trace("", e);
                    return false;
                }
            }`