async function getDynamoDBTables(dynamoDBClient: AWS.DynamoDB, LastEvaluatedTableName: undefined | string = undefined): Promise<AWS.DynamoDB.TableNameList> {
  const results = await dynamoDBClient.listTables({ExclusiveStartTableName: LastEvaluatedTableName}).promise();
  const tableNames = results.TableNames || [];
  console.log(`found ${tableNames.length} ending at ${results.LastEvaluatedTableName}`);
  if (results.LastEvaluatedTableName) {
    return tableNames.concat(await getDynamoDBTables(dynamoDBClient, results.LastEvaluatedTableName));
  } else {
    return tableNames;
  }
}