title: The authorization header is malformed; the region 'us-east-1' is wrong; expecting 'eu-central-1'
body: <p>using Node.JS with the following config file </p>
  
  <p>{
  "accessKeyId" :"XXX",
  "secretAccessKey" :"XXXX",
  "region": "eu-central-1",
  "signatureVersion": "v4"
  }</p>
  
  <p>I still receive this error message as if the aws sdk tries to access a us-east-1 region . </p>
  
  <p>Any idea ?</p>