Amazon AWS SDK User Manual

You can hard-code credentials by passing the credential information to the configuration object using
AWS.config.update():
AWS.config.update({accessKeyId: 'akid', secretAccessKey: 'secret'});
Setting the Region
The AWS SDK for Node.js doesn't select the region by default.You can choose a region similarly to
setting credentials by either loading from disk or using AWS.config.update():
AWS.config.update({region: 'us-west-1'});
Service-Specific Configuration
Occasionally, you might want to apply configuration only to one service. For instance, you want to use
multiple EC2 objects in different regions.You can do this by passing configuration data directly to the
service object constructor:
var ec2 = new AWS.EC2({region: 'ap-southeast-2', maxRetries: 15});
Note that the constructor takes all of the same configuration data as the AWS.config object described
above, including credential information.
Immutable Configuration Data
Global configuration changes apply to all requests for all newly created services. Any newly created
service will merge its local options on top of the global configuration data at the time of creation.This
means that any future updates to the global AWS.config object will not apply to existing service objects.
These services would have to be manually updated with the new configuration data, or recreated using
the following command (assuming an existing s3 service object):
s3 = new AWS.S3(s3.config);
Version 0.9.1-pre.2 : Preview
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AWS SDK for Node.js Getting Started Guide
Setting the Region

Amazon AWS SDK Specifications

General

Category	Software Development Kit (SDK)
Developer	Amazon Web Services (AWS)
License	Apache License 2.0
Purpose	To enable developers to interact with AWS services from their applications.
Supported Languages	Java, Python, JavaScript, .NET, Ruby, PHP, Go, C++
Supported AWS Services	All AWS services
Operating Systems	Windows, macOS, Linux
Latest Version	Varies by SDK and language. Refer to the official AWS documentation for the specific SDK.
Repository	GitHub (for many SDKs)
Documentation	Available on the AWS website.
SDK Features	API abstraction, request signing, error handling, retry logic, data serialization, and support for various authentication methods.