code: def get(self, cfg):
          
          collection = cfg[AccessParams.KEY_COLLECTION]
          match_params = cfg[AccessParams.KEY_MATCH_PARAMS] if AccessParams.KEY_MATCH_PARAMS in cfg else None
  
          target_type = cfg[AccessParams.KEY_TYPE] if AccessParams.KEY_TYPE in cfg else AccessParams.TYPE_MULTI
          if target_type == AccessParams.TYPE_SINGLE:
              result = CRUD.read_single(self.__db, collection, match_params)
          elif target_type == AccessParams.TYPE_MULTI:
              result = CRUD.read_multi(self.__db, collection, match_params)
          return result
docs: Reads single document or list of documents from MongoDB collection
          :param cfg:
              {
                  AccessParams.KEY_COLLECTION: <Collection to read data from>,
                  AccessParams.KEY_MATCH_PARAMS: <A query that matches the documents to select>,
                  AccessParams.KEY_TYPE: <AccessParams.TYPE_SINGLE or AccessParams.TYPE_MULTI>
              }
          :return: single document or list of documents