How to use the jardin.database.drivers.pg.DatabaseConnection function in jardin

def build_connections(self, name):
        connections = []
        configs = self.db_configs(name)
        for db in configs:
            if db.scheme not in self.SUPPORTED_SCHEMES:
                raise UnsupportedDriver('%s is not a supported driver' % db.scheme)
            elif db.scheme == 'postgres' or db.scheme == 'redshift':
                import jardin.database.drivers.pg as driver
            elif db.scheme == 'mysql':
                import jardin.database.drivers.mysql as driver
            elif db.scheme == 'sqlite':
                import jardin.database.drivers.sqlite as driver
            elif db.scheme == 'snowflake':
                import jardin.database.drivers.sf as driver
            connections.append(driver.DatabaseConnection(db, name))
        return connections

def execute(self, *query):
        return super(DatabaseConnection, self).execute(*query)