OpenStack数据库创建实例BadRequestException

Question

我为创建新数据库实例使用了OpenStack SDK，但是它引起了错误 badrequestException：

BadRequestException: 400: Client Error for url: 
[URL]:8779/v1.0/ab77ed8ae3f744f4baf4fb7bc97848cc/instances,
Resource None cannot be found.

我的数据：

data: dict = {'name': 'nhinn-db-01',
 'nics': [{'net-id': 'd57e7864-5961-4a64-a5ce-005e05d71ccf'}],
 'datastore': {'type': 'mysql', 'version': '5.7.31'},
 'flavor': object Flavor
}

conn: Connection
conn.database.create_instance(**data)