docs: def lambda_handler(event, context):
      """Main handler."""
      email = event.get('email', None)
      api_key = event.get('api_key', None)
      if not (api_key or email):
          msg = "Missing authentication parameters in your request"
          return {'success': False, 'message': msg}
      indicators = list(set(event.get('indicators', list())))
      if len(indicators) == 0:
          return {'success': False, 'message': "No indicators sent in"}
      user = check_api_key(email, api_key)
      if not user:
          return {'success': False, 'message': "Email or API key was invalid."}
      role = check_role(user)
      if not role:
          return {'success': False, 'message': "Account not approved to contribute."}
      current_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
      table = boto3.resource("dynamodb").Table(os.environ['database'])
      with table.batch_writer(overwrite_by_pkeys=['indicator']) as batch:
          for item in indicators:
              if item == "":
                  continue
              if len(item) != 32:
                  item = hashlib.md5(item).hexdigest()
              try:
                  batch.put_item(Item={'indicator': item,
                                       'creator': user.get('email'),
                                       'datetime': current_time})
              except Exception as e:
                  logger.error(str(e))
  
      msg = "Wrote {} indicators".format(len(indicators))
      return {'success': True, 'message': msg, 'writeCount': len(indicators)}