title: AccessDeniedException in AWS DynamoDB
body: <p>I am new to amazon Dynamo DB. I am getting the access denied Exception.<br />
  Please help me out from this.</p>
  
  <p>Error:</p>
  
  <blockquote>
    <p>User: arn:aws:sts::xx:assumed-role/Cognito_SampleUnauth_Role/CognitoIdentityCredentials is not authorized to perform: dynamodb:DescribeTable on resource: arn:xxx</p>
  </blockquote>