public function drop_user($user, $host = '%') {
		$query = 'REVOKE ALL PRIVILEGES, GRANT OPTION FROM ' . $this->quote_identifier($user) . '@' . $this->quote($host);
		$statement = $this->get_statement($query);
		$statement->execute();

		$query = 'DROP USER ' . $this->quote_identifier($user) . '@' . $this->quote($host);
		$statement = $this->get_statement($query);
		$statement->execute();

		$query = 'FLUSH PRIVILEGES';
		$statement = $this->get_statement($query);
		$statement->execute();
	}