参照这篇文章 http://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/loading-node-credentials-shared.html
You can keep your AWS credentials data in a shared file used by SDKs and the command line interface. The SDK for JavaScript automatically searches the shared credentials file for credentials when loading. Where you keep the shared credentials file depends on your operating system:
Linux users:
~/.aws/credentialsWindows users:
C:\Users\USER_NAME\.aws\credentials
If you do not already have a shared credentials file, you can create one in the designated directory. Add the following text to the credentials file, replacing <YOUR_ACCESS_KEY_ID> and <YOUR_SECRET_ACCESS_KEY>values:
[default]
aws_access_key_id = <YOUR_ACCESS_KEY_ID>
aws_secret_access_key = <YOUR_SECRET_ACCESS_KEY>
新建credential 文件 并将acess key 等填入 就可以本地运行 lambda