.NET SDK - Can't remove shared link password (password = null)

Hello!

I'm want to achieve remove the shared link password, but it's not going very well.

Even if you set "Password = null", it will not be reflected.

It seems that "IsPasswordEnabled" can’t be changed to "false".

// sample

var sharedLinkRequest = new BoxSharedLinkRequest
{
     UnsharedAt = null, // result:OK
     Password = null // result:NG
};

var folderRequest = new BoxFolderRequest
{
     Id = "012345678", // The folder ID where the shared link password is set.
     SharedLink = sharedLinkRequest
};

BoxFolder folder = await client.FoldersManager.UpdateInformationAsync(folderRequest);

Thanks for help.