Debug logging of GitHub account import

Explicit tracing of account provisioning from GitHub
to Gerrit. It seems that sporadically users are
logged in as Anonymous Coward instead of using
their GitHub account settings.

This extra logging would allow to better troubleshoot
the situation and keep track of the users impacted.

Change-Id: Id23191ae3b5615dd1ded2fc040e348c35e767c92

github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/AccountController.java

diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/AccountController.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/AccountController.java
index 3d87a6c..4235308 100644
--- a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/AccountController.java
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/AccountController.java
@@ -36,6 +36,7 @@
 import com.google.common.collect.Sets;
 import com.google.gerrit.extensions.restapi.RawInput;
 import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.reviewdb.client.Account.Id;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.account.AccountCache;
@@ -44,6 +45,7 @@
 import com.google.gerrit.server.account.AccountResource;
 import com.google.gerrit.server.account.AddSshKey;
 import com.google.gerrit.server.account.AuthRequest;
+import com.google.gerrit.server.account.AuthResult;
 import com.google.gerrit.server.account.GetSshKeys;
 import com.google.gerrit.server.account.GetSshKeys.SshKeyInfo;
 import com.google.gwtorm.server.OrmException;
@@ -90,12 +92,22 @@
     String fullName = req.getParameter("fullname");
     String email = req.getParameter("email");
     try {
-      accountManager.link(user.getAccountId(), AuthRequest.forEmail(email));
-      Account a = dbProvider.get().accounts().get(user.getAccountId());
+      Id accountId = user.getAccountId();
+      AuthResult result =
+          accountManager.link(accountId, AuthRequest.forEmail(email));
+      log.debug("Account {} linked to email {}: result = {}", accountId, email,
+          result);
+
+      Account a = dbProvider.get().accounts().get(accountId);
       a.setPreferredEmail(email);
       a.setFullName(fullName);
       dbProvider.get().accounts().update(Collections.singleton(a));
-      accountCache.evict(user.getAccountId());
+      log.debug(
+          "Account {} updated with preferredEmail = {} and fullName = {}",
+          accountId, email, fullName);
+
+      accountCache.evict(accountId);
+      log.debug("Account cache evicted for {}", accountId);
     } catch (AccountException | OrmException e) {
       throw new ServletException("Cannot associate email '" + email
           + "' to current user '" + user + "'", e);