code: def post(self, **kwargs):
          
          data = request.get_json(force=False)
          if data is None:
              data = {}
          result = {}
          for query_name, config in data.items():
              if config is None or not isinstance(config, dict) \
                      or (set(config.keys()) != {'stat', 'params'} and
                          set(config.keys()) != {'stat'}):
                  raise InvalidRequestInputError(
                      'Invalid Input. It should be of the form '
                      '{ STATISTIC_NAME: { "stat": STAT_TYPE, '
                      '"params": STAT_PARAMS \}}'
                  )
              stat = config['stat']
              params = config.get('params', {})
              try:
                  query_cfg = current_stats.queries[stat]
              except KeyError:
                  raise UnknownQueryError(stat)
  
              permission = current_stats.permission_factory(stat, params)
              if permission is not None and not permission.can():
                  message = ('You do not have a permission to query the '
                             'statistic "{}" with those '
                             'parameters'.format(stat))
                  if current_user.is_authenticated:
                      abort(403, message)
                  abort(401, message)
              try:
                  query = query_cfg.query_class(**query_cfg.query_config)
                  result[query_name] = query.run(**params)
              except ValueError as e:
                  raise InvalidRequestInputError(e.args[0])
              except NotFoundError as e:
                  return None
          return self.make_response(result)
docs: Get statistics.