Wrapper for pymongo.find()
        :param db: db connection
        :param collection: collection to read data from
        :param match_params: a query that matches the documents to select
        :return: list of documents ('_id' is excluded from result)

def read_multi(db, collection, match_params=None):
        """
        Wrapper for pymongo.find()
        :param db: db connection
        :param collection: collection to read data from
        :param match_params: a query that matches the documents to select
        :return: list of documents ('_id' is excluded from result)
        """
        return list(db[collection].find(match_params if match_params else {}, {'_id': False}))