Added event on saving User cascade save EmailAddress

spring-data-mongodb/src/main/java/org/baeldung/config/MongoConfig.java

@@ -1,5 +1,7 @@
 package org.baeldung.config;
 
+import org.baeldung.event.CascadingMongoEventListener;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
@@ -25,4 +27,9 @@ public class MongoConfig extends AbstractMongoConfiguration {
     public String getMappingBasePackage() {
         return "org.baeldung";
     }
+    
+    @Bean
+    public CascadingMongoEventListener cascadingMongoEventListener(){
+        return new CascadingMongoEventListener();
+    }
 }