chore: added oauth api call example

README.md

@@ -218,21 +218,8 @@ public class Example {
 We are introducing Client Credentials Flow-based OAuth 2.0 authentication. 
 This feature is currently in beta and its implementation is subject to change.
 
-```java
-import com.twilio.credential.ClientCredentialProvider;
-
-public class Test {
-  public static void main(String[] args) {
-    String clientId = "YOUR_CLIENT_ID";
-    String clientSecret = "YOUR_CLIENT_SECRET";
-
-    Twilio.init(new ClientCredentialProvider(clientId, clientSecret));
+Detailed examples [here](https://github.com/twilio/twilio-java/tree/main/examples/FetchMessageUsingOAuth.md)
 
-    // Make API requests here using the authenticated client
-  }
-}
-
-```
 ### Iterate through records
 
 The library automatically handles paging for you. With the `read` method, you can specify the number of records you want to receive (`limit`) and the maximum size you want each page fetch to be (`pageSize`). The library will then handle the task for you, fetching new pages under the hood as you iterate over the records.

examples/FetchMessageUsingOAuth.md

@@ -0,0 +1,19 @@
+
+import com.twilio.Twilio;
+import com.twilio.credential.ClientCredentialProvider;
+import com.twilio.rest.api.v2010.account.Message;
+
+public class FetchMessageUsingOAuth {
+    public static void main(String[] args) {
+        String clientId = "YOUR_CLIENT_ID";
+        String clientSecret = "YOUR_CLIENT_SECRET";
+        String accountSid = "YOUR_ACCOUNT_SID";
+        Twilio.init(new ClientCredentialProvider(clientId, clientSecret), accountSid);
+        /*
+          Or use the following if accountSid is not required as a path parameter for an API or when setting accountSid in the API.
+          Twilio.init(new ClientCredentialProvider(clientId, clientSecret));
+        */
+        String messageSid = "YOUR_MESSAGE_SID";
+        Message message = Message.fetcher(messageSid).fetch();
+    }
+}