Can't retrieve parameters from Parameter Store from Node app running on EC2 Ubuntu

Question

I'm trying to retrieve parameters from Parameter Store from a Node app running on EC2 Ubuntu, but the browser console throws this error: 
credentialserror: Missing credentials in config, if using AWS_CONFIG_FILE, set AWS_SDK_LOAD_CONFIG=1
====== end of error ======

**However**, there's a role attached to the EC2 instance that grants EC2 access to SSM Parameter Store and I SUCCESSFULLY retrieve parameters from Parameter Store using the CLI in EC2 (using command: aws ssm get-parameter --name PARAMETER_NAME --region AWS_REGION --with-decryption). 
I tried to explicitly configure the AWS SDK to use the correct IAM role that is associated with the EC2 instance that the Node app is running on,  I get the following type error states that EC2MetadataCredentials is not a constructor. According to the documentation, EC2MetadataCredentials is no longer supported, but I don't know another way to have my node app use the IAM role associated with EC2.

Answer

Hi, yes, I believe that you are on the right track: you must assume the EC2 execution role if you want your call to success.

If you look at https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/loading-node-credentials-iam.html , it says

```
If you run your Node.js application on an Amazon EC2 instance, you can leverage IAM roles for Amazon EC2 to automatically
 provide credentials to the instance. If you configure your instance to use IAM roles, the SDK automatically selects the IAM
 credentials for your application, eliminating the need to manually provide credentials.
```

Then section "Global configuration Examples" of https://pinecone-forest.com/aws-guide-v0.0.65/Configuring-the-SDK-for-JavaScript.html will detail how to set those credentials

Can't retrieve parameters from Parameter Store from Node app running on EC2 Ubuntu

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