title: AWS SAM: An error occurred (ValidationError) when calling the CreateChangeSet operation: Parameters: [IdentityNameParameter] must have values
body: <p>I want to get started with AWS SAM and I encounter this issue when trying to deploy to the AWS.</p>
  
  <p>I am trying to deploy a 'Hello World!'-application that can be found <a href="https://github.com/aws-samples/serverless-app-examples/tree/master/javascript/hello-world" rel="noreferrer">here</a>.</p>
  
  <p>This is the error I encounter:</p>
  
  <p><pre>
  $ sam package --s3-bucket dolphin-code --s3-prefix prod --output-template-file packaged.yaml --region eu-central-1</p>
  
  <p>Uploading to prod/de65208b144ad296cfdc39666a47ad1c  34671 / 34671.0  (100.00%)
  Successfully packaged artifacts and wrote output template to file packaged.yaml.
  Execute the following command to deploy the packaged template
  sam deploy --template-file /builds/gitlab/dophin/apis/hello-world/packaged.yaml --stack-name </p>
  
  <p>$ sam deploy --template-file ./packaged.yaml --stack-name prod --capabilities CAPABILITY_IAM --region eu-central-1</p>
  
  <code>Deploying with following values
  ===============================
  Stack name                 : prod
  Region                     : eu-central-1
  Confirm changeset          : False
  Deployment s3 bucket       : None
  Capabilities               : ["CAPABILITY_IAM"]
  Parameter overrides        : {}
  
  Initiating deployment
  =====================
  Error: Failed to create changeset for the stack: prod, An error occurred (ValidationError) when 
  calling the CreateChangeSet operation: Parameters: [IdentityNameParameter] must have values
  ERROR: Job failed: exit code 1
  </code></pre>
  
  <p>For me, that seems to be an error in the AWS CLI and not in SAM directly, right?</p>
  
  <p>Can anyone help me? Thanks in advance!</p>