code: @Deprecated
  	protected boolean requiresAuthentication(HttpServletRequest request, HttpServletResponse response) {
  		String providerId = getRequestedProviderId(request);
  		if (providerId != null){
  			Set<String> authProviders = authServiceLocator.registeredAuthenticationProviderIds();
  			return authProviders.contains(providerId);
  		}
  		return false;
  	}
docs: Indicates whether this filter should attempt to process a social network login request for the current invocation.
  <p>Check if request URL matches filterProcessesUrl with valid providerId.
  The URL must be like {filterProcessesUrl}/{providerId}.
  @return <code>true</code> if the filter should attempt authentication, <code>false</code> otherwise.