Amplify CredentialsProviderError with S3 storage and Next.js SSR

Question

I am currently trying to get a signedUrl for the files in my s3 bucket. Everything works great locally, but when I deploy to AWS Amplify, I get the following error:

```
Error: CredentialsProviderError: Could not load credentials from any providers

```

Here is where I am getting my error. My app is built with Next.js, and I'm trying to get the signedUrl in a server action.

What am I doing wrong that is causing me to only get this error in a production build but not a local build? I'm assuming it would be an issue with IAM permissions, but even when I update the service role I still get the issue.

```
export async function getSignedUrlForFile(
  fileKey: string
): Promise> {
  const command = new GetObjectCommand({
    Bucket: bucketName,
    Key: fileKey,
  });

try {
    const signedUrl = await getSignedUrl(s3, command, {
      expiresIn: 3600, // 1 hour
    });

return { success: true, value: signedUrl };
  } catch (error) {
    console.error('Error getting signed URL:', error);
    return { success: false, error: String(error) };
  }
}
```

I am not using Amplify's storage because I do not want to use Amplify's auth service. I am using auth somewhere else.

re:Post Agent · Answer

The issue you're experiencing with the CredentialsProviderError in your production environment but not locally is likely related to how credentials are being provided to your application when it's deployed on AWS Amplify.

When running locally, your AWS credentials are typically available through your local configuration (e.g., ~/.aws/credentials or environment variables). However, in a production environment like AWS Amplify, the application needs to be explicitly configured to use the correct IAM role or credentials.

To resolve this issue, you need to ensure that:

1. The IAM role associated with your Amplify app has the necessary permissions to access the S3 bucket and perform the GetObject operation.

2. Your application is configured to use the correct credentials provider when running in the Amplify environment.

For a Next.js application running on AWS Amplify, you can try the following approach:

1. In your code where you initialize the S3 client, use the AWS SDK's default credential provider chain. This allows the SDK to automatically find and use the appropriate credentials based on the environment:

```javascript
import { S3Client } from "@aws-sdk/client-s3";

const s3 = new S3Client({
  region: "your-region",
});
```

2. Make sure the IAM role associated with your Amplify app has the necessary S3 permissions. You can do this by updating the Amplify app's service role in the AWS IAM console.

3. If you're using environment variables to configure your S3 client, ensure they are properly set in your Amplify app's environment variables section.

4. If you're still facing issues, you might need to explicitly configure the credentials provider for your S3 client. You can do this by using the EnvironmentCredentials provider:

```javascript
import { S3Client } from "@aws-sdk/client-s3";
import { EnvironmentCredentials } from "@aws-sdk/credential-providers";

const s3 = new S3Client({
  region: "your-region",
  credentials: new EnvironmentCredentials('AWS')
});
```

Remember that when using server-side rendering or server actions in Next.js, the code runs on the server, so you need to ensure that the server environment has access to the necessary credentials.

By implementing these changes, you should be able to resolve the CredentialsProviderError in your production environment on AWS Amplify.  
**Sources**  
['Network Error' uploading files with Amplify Storage | AWS re:Post](https://repost.aws/articles/ARySQq2FIUSxGR6YTrBhxDQQ/network-error-uploading-files-with-amplify-storage)  
[Use Amplify Storage with any S3 bucket - React - AWS Amplify Gen 2 Documentation](https://docs.amplify.aws/react/build-a-backend/storage/use-with-custom-s3/)

Amplify CredentialsProviderError with S3 storage and Next.js SSR

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