Update readme too

Author: paulhenri-l

README.md

@@ -83,9 +83,11 @@ Add dynamodb configs to config/database.php:
 
     'dynamodb' => [
         'driver' => 'dynamodb',
-        'region' => env('AWS_DEFAULT_REGION'),
-        'access_key' => env('AWS_ACCESS_KEY_ID'),
-        'secret_key' => env('AWS_SECRET_ACCESS_KEY')
+        'key' => env('AWS_ACCESS_KEY_ID'),
+        'secret' => env('AWS_SECRET_ACCESS_KEY'),
+        'token' => env('AWS_SESSION_TOKEN'),
+        'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
+        'endpoint' => env('DYNAMODB_ENDPOINT'),
     ],
 
     ...

src/Kitar/Dynamodb/Connection.php

@@ -74,15 +74,25 @@ protected function createClient(array $config)
         $dynamoConfig = [
             'region' => $config['region'],
             'version' => 'latest',
+            'endpoint' => $config['endpoint'] ?? null,
         ];
 
+        if ($key = $config['access_key'] ?? null) {
+            $config['key'] = $key;
+            unset($config['access_key']);
+        }
+
+        if ($key = $config['secret_key'] ?? null) {
+            $config['secret'] = $key;
+            unset($config['secret_key']);
+        }
+
         if (isset($config['key']) && isset($config['secret'])) {
             $dynamoConfig['credentials'] = Arr::only(
                 $config, ['key', 'secret', 'token']
             );
         }
 
-
         return (new AwsSdk($dynamoConfig))->createDynamoDb();
     }