AWS Cloudfront: Credential should be scoped to a valid region

Question

When connecting to AWS CloudFront via the API, no matter what I do, I get the Exception: ``` Credential should be scoped to a valid region ``` The same credentials work on any other request the account has permissions for, like S3.

Accepted Answer

The Exception is caused by accessing CloudFront with any Region set other than "us-east-1". Because CloudFront is basically regionless, it requires you to use only the default region "us-east-1" to talk to it.

http://docs.aws.amazon.com/general/latest/gr/signature-v4-troubleshooting.html

You can workaround this by using the same credentials you use elsewhere but instantiate the CloudFront client with the Region explicitly set:

```
AmazonCloudFrontClient client = new AmazonCloudFrontClient(Amazon.RegionEndpoint.USEast1);
```

Which does beg the follow-on question: Why does the API not just do this for you?

Edit: Issue posted. https://github.com/aws/aws-sdk-net/issues/115

AWS Cloudfront: Credential should be scoped to a valid region

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