title: DynamoDB Pagination via Boto3, NextToken is not present but LastEvaluatedKey is?
body: <p>The documentation for boto3 and dynamodb paginators specify that NextToken should be returned when paging, and you would then include that token in the next query for StartingToken to resume a paging session (as would happen when accessing information via a RESTful API). </p>
  
  <p>However, my testing shows that it doesn't return NextToken in the results, but rather LastEvaluatedKey. I was thinking I could use LastEvaluatedKey as the token, but that doesn't work?</p>
  
  <pre><code>paginator = client.get_paginator('scan')
  page_iterator = paginator.paginate(TableName='test1', PaginationConfig={'PageSize': 1 , 'MaxItems': 5000,  'MaxSize': 1 })
  
      for page in page_iterator:
          print(page)
          break   
  </code></pre>
  
  <p>I would expect the page object returned from the page_iterator to include NextToken Key but it does not?</p>
  
  <pre><code>{'Items': [{'PK': {'S': '99'}, 'SK': {'S': '99'}, 'data': {'S': 'Test Item 99'}}], 'Count': 1, 'ScannedCount': 1, 'LastEvaluatedKey': {'PK': {'S': '99'}, 'SK': {'S': '99'}}, 'ResponseMetadata': {'RequestId': 'DUE559L8KVKVH8H7G0G2JH0LUNVV4KQNSO5AEMVJF66Q9ASUAAJG', 'HTTPStatusCode': 200, 'HTTPHeaders': {'server': 'Server', 'date': 'Mon, 27 May 2019 14:22:09 GMT', 'content-type': 'application/x-amz-json-1.0', 'content-length': '153', 'connection': 'keep-alive', 'x-amzn-requestid': 'DUE559L8KVKVH8H7G0G2JH0LUNVV4KQNSO5AEMVJF66Q9ASUAAJG', 'x-amz-crc32': '3759060959'}, 'RetryAttempts': 0}}
  </code></pre>
  
  <p>What am I missing?</p>
  
  <p>UPDATE: Somehow related to this? <a href="https://stackoverflow.com/questions/39201093/how-to-use-boto3-pagination/39206941">How to use Boto3 pagination</a></p>