chore: Add example for using multi region setup in a single application (#849)

Author: manisha1997

README.md

@@ -266,6 +266,8 @@ Twilio.setEdge("sydney");
 
 This will result in the `hostname` transforming from `api.twilio.com` to `api.sydney.au1.twilio.com`.
 
+To use multiple region within same application, refer [MultiRegionClient.md](https://github.com/twilio/twilio-java/blob/main/examples/MultiRegionClient.md)
+
 ### Enable Debug Logging
 
 This library uses SLF4J for logging. Consult the [SFL4J documentation](http://slf4j.org/docs.html) for information about logging configuration.

examples/MultiRegionClient.md

@@ -0,0 +1,41 @@
+```java
+package com.twilio.example;
+
+import com.twilio.http.TwilioRestClient;
+import com.twilio.rest.api.v2010.account.Message;
+import com.twilio.type.PhoneNumber;
+
+public class MultiRegionExample {
+  public static final String ACCOUNT_SID = System.getenv("TWILIO_ACCOUNT_SID");
+  public static final String AUTH_TOKEN = System.getenv("TWILIO_AUTH_TOKEN");
+
+  public static void main(String[] args) {
+
+    TwilioRestClient client = new TwilioRestClient.Builder(ACCOUNT_SID, AUTH_TOKEN).region("us1").build();
+
+    Message message = Message
+        .creator(
+            new PhoneNumber("+1XXXXXXXXXX"),
+            new PhoneNumber("+1XXXXXXXXXX"),
+            "This is the ship that made the Kessel Run in fourteen parsecs?"
+        )
+        .create(client);
+
+    System.out.println(message.getSid());
+
+    TwilioRestClient client2 = new TwilioRestClient.Builder(ACCOUNT_SID, AUTH_TOKEN).region("au1").build();
+
+    Message message2 = Message
+        .creator(
+            new PhoneNumber("+1XXXXXXXXXX"),
+            new PhoneNumber("+1XXXXXXXXXX"),
+            "This is the ship that made the Kessel Run in fourteen parsecs?"
+        )
+        .create(client2);
+
+    System.out.println(message2.getSid());
+  }
+}
+
+
+```