feat(medusa-file-s3): Allow all AWS options in config (#2809)

docs/content/add-plugins/s3.md

@@ -124,6 +124,33 @@ const plugins = [
 ];
 ```
 
+### Add AWS Configurations
+
+You can pass AWS configurations in the plugin's options under the property `aws_config_object`. This property is an object that accepts [AWS Configurations](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Config.html) as its properties.
+
+For example, you can pass the `region`, `access_key_id` and `secret_access_key` in `aws_config_object`:
+
+```jsx title=medusa-config.js
+const plugins = [
+  //...
+  {
+    resolve: `medusa-file-s3`,
+    options: {
+        s3_url: process.env.S3_URL,
+        bucket: process.env.S3_BUCKET,
+        aws_config_object: {
+          region: process.env.S3_REGION,
+          access_key_id: process.env.S3_ACCESS_KEY_ID,
+          secret_access_key: process.env.S3_SECRET_ACCESS_KEY,
+        }
+    },
+  },
+];
+```
+
+Make sure to define `S3_REGION`, `S3_ACCESS_KEY_ID`, and `S3_SECRET_ACCESS_KEY` in your environment variables first.
+
+
 :::caution
 
 If you have multiple storage plugins configured, the last plugin declared in the `medusa-config.js` file will be used.