Log participant name

Author: cYKatherine

src/main/java/com/uid2/core/handler/GenericFailureHandler.java

@@ -1,5 +1,8 @@
 package com.uid2.core.handler;
 
+import com.uid2.shared.auth.IAuthorizable;
+import com.uid2.shared.auth.OperatorKey;
+import com.uid2.shared.middleware.AuthMiddleware;
 import io.vertx.core.Handler;
 import io.vertx.core.http.HttpClosedException;
 import io.vertx.core.http.HttpServerResponse;
@@ -19,11 +22,18 @@ public void handle(RoutingContext ctx) {
         String url = ctx.normalizedPath();
         Throwable t = ctx.failure();
 
+        final IAuthorizable profile = AuthMiddleware.getAuthClient(ctx);
+        final OperatorKey operatorKey = profile instanceof OperatorKey ? (OperatorKey) profile : null;
+        String participant = "unknown";
+        if (operatorKey != null) {
+            participant = operatorKey.getName();
+        }
+
         if (t != null) {
             if (statusCode >= 500 && statusCode < 600) { // 5xx is server error, so error
-                LOGGER.error("URL: [{}] - Error response code: [{}] - Error:", url, statusCode, t);
+                LOGGER.error("URL: [{}], Participant: [{}] - Error response code: [{}] - Error:", url, participant, statusCode, t);
             } else if (statusCode >= 400 && statusCode < 500) { // 4xx is user error, so just warn
-                LOGGER.warn("URL: [{}] - Error response code: [{}] - Error:", url, statusCode, t);
+                LOGGER.warn("URL: [{}], Participant: [{}] - Error response code: [{}] - Error:", url, participant, statusCode, t);
             }
         }