How to handle key value store creation?

[sergeda]

How to create key value store only if it doesn't exist?
There is no error like BucketExist:

pub enum CreateKeyValueErrorKind {
    InvalidStoreName,
    TooLongHistory,
    JetStream,
    BucketCreate,
    TimedOut,
}

Then what will happen when we call create_key_value and specify name of the bucket that already exist? What type of error will be return in such case?

[Jarema]

There will be no error if the underlying stream already exists with the same configuraiton.
If you want to catch stream name already in use with a different configuration" you need to downcast the JetStream error.

I think it's a good idea to expose this one directly.
Will add it.