Update README.md

Author: ynevet

README.md

@@ -5,4 +5,17 @@ A wrapper class around AWS DynamoDB document client for DynamoDB or DAX usages.
 npm install amazon-dynamodb-doc-client-wrapper
 
 ## Usage example:
-Soon
+
+```typescript
+import { DocumentClientWrapper, ClientType } from "../infra/dynamo-document-client-wrapper";
+import { DocumentClient } from "aws-sdk/lib/dynamodb/document_client";
+
+// Initialized as DAX docuemnt client:
+console.log("Going to initialize a DAX document client");
+clientWrapper = new DocumentClientWrapper(ClientType.DynamoDBDax, [appConfig.dynamoDaxEndpoint()], appConfig.dynamoRegion(), appConfig.dynamoTimeout());
+
+
+// Initialized as DAX docuemnt client:
+console.log("Going to initialize a dynamaoDB document client");
+clientWrapper = new DocumentClientWrapper(ClientType.DynamoDB, [appConfig.dynamoEndpoint()], appConfig.dynamoRegion(), appConfig.dynamoTimeout());
+```