Merge pull request #97 from spacesuitdiver/patch-1

Add credentials in the event no awscli credentials are available.

Author: rehrumesh

README.md

@@ -165,14 +165,19 @@ var AWS = require('aws-sdk');
 ```
 new AWS.DynamoDB.DocumentClient({
     region: 'localhost',
-    endpoint: 'http://localhost:8000'
+    endpoint: 'http://localhost:8000',
+    accessKeyId: 'DEFAULT_ACCESS_KEY',  // needed if you don't have aws credentials at all in env
+    secretAccessKey: 'DEFAULT_SECRET' // needed if you don't have aws credentials at all in env
 })
 ```
 e.g. for dynamodb document client sdk
 ```
 new AWS.DynamoDB({
     region: 'localhost',
-    endpoint: 'http://localhost:8000'
+    endpoint: 'http://localhost:8000',
+    accessKeyId: 'DEFAULT_ACCESS_KEY',  // needed if you don't have aws credentials at all in env
+    secretAccessKey: 'DEFAULT_SECRET' // needed if you don't have aws credentials at all in env
+
 })
 ```