anchor.diff:        );
         final message = createUploaderConfirmationEmail(
           packageName: packageName,
  -        activeAccountEmail: userEmail,
  +        activeAccountEmail: user.email,
           addedUploaderEmail: uploaderEmail,
           confirmationUrl: confirmationUrl,
         );
  
positive.code:   @override
    Future addUploader(String packageName, String uploaderEmail) async {
      await withAuthenticatedUser((AuthenticatedUser user) async {
        final userEmail = user.email;
        final packageKey = db.emptyKey.append(models.Package, id: packageName);
        final package = (await db.lookup([packageKey])).first as models.Package;
  
  
negative.code:     // because we don't even know which package or version is going to be
      // uploaded.
      return withAuthenticatedUser((AuthenticatedUser user) {
        _logger.info('User: ${user.email}.');
  
        final guid = uuid.v4().toString();
        final String object = storage.tempObjectName(guid);
  