When MongoDB username/password is not provided, don't sent it to MongoDB::MongoClient because even the undef values tell MongoDB that it should try to authenticate
When MongoDB username/password is not provided, don't sent it to MongoDB::MongoClient because even the undef values tell MongoDB that it should try to authenticate

berkmancenter/mediacloud,AchyuthIIIT/mediacloud,AchyuthIIIT/mediacloud,AchyuthIIIT/mediacloud,berkmancenter/mediacloud,AchyuthIIIT/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud,AchyuthIIIT/mediacloud,AchyuthIIIT/mediacloud,AchyuthIIIT/mediacloud,berkmancenter/mediacloud,AchyuthIIIT/mediacloud,AchyuthIIIT/mediacloud