code: def delete(self, cfg, triggers_on=True):
          
          collection = cfg[AccessParams.KEY_COLLECTION]
          match_params = cfg[AccessParams.KEY_MATCH_PARAMS] if AccessParams.KEY_MATCH_PARAMS in cfg else {}
          target_type = cfg[AccessParams.KEY_TYPE] if AccessParams.KEY_TYPE in cfg else AccessParams.TYPE_MULTI
          if triggers_on:
              self.__exec_trigger(Trigger.ACTION_BEFORE_DELETE, collection, None, match_params)
          if target_type == AccessParams.TYPE_SINGLE:
              result = CRUD.delete_single(self.__db, collection, match_params)
          elif target_type == AccessParams.TYPE_MULTI:
              result = CRUD.delete_multi(self.__db, collection, match_params)
          if triggers_on:
              self.__exec_trigger(Trigger.ACTION_AFTER_DELETE, collection, None, match_params)
          return result
docs: Deletes document(s) from MongoDB collection
          :param cfg:
              {
                  AccessParams.KEY_COLLECTION: <Collection to update>,
                  AccessParams.KEY_MATCH_PARAMS: <A query that matches the documents to delete>,
                  AccessParams.KEY_TYPE: <AccessParams.TYPE_SINGLE or AccessParams.TYPE_MULTI>
              }
          :param triggers_on: enables/disables triggers (default - True)
          :return: result of delete operation - id or number of deleted documents