I am finally at a point where i can test against AWS and I am running into a problem where I need to specify the region (not just with something like https://dynamodb.us-west-2.amazonaws.com/). There seems to be no option to specify the region for the table or the server. I am getting errors indicating a problem with credentials -- the creds are in us-east-1 but the dynamodb is us-west-2. How is this to be done?