can't encryt storage when creating mongodb

[bee2287448]

Affected Resource(s)

Please list the resources as a list, for example:

• alicloud_mongodb_instance

Expected Behavior

What should have happened?
I want to use terrafrom to create a mongodb instance. but i can not find any argument to use kms key to encrype the storage.
When i use website to create a mongodb ,i could choose disk encrytion.