OAuth2AuthorizationEndpointFilter before AbstractPreAuthenticatedProcessingFilter

Issue gh-85

config/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationServerConfigurer.java

@@ -105,7 +105,7 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 				new OAuth2AuthorizationEndpointFilter(
 						getRegisteredClientRepository(builder),
 						getAuthorizationService(builder));
-		builder.addFilterAfter(postProcess(authorizationEndpointFilter), FilterSecurityInterceptor.class);
+		builder.addFilterBefore(postProcess(authorizationEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
 
 		OAuth2TokenEndpointFilter tokenEndpointFilter =
 				new OAuth2TokenEndpointFilter(