Usage.fromMap fails on `completions` property

[tomtaila]

I get the following when requesting some completions:

error: type 'Null' is not a subtype of type 'int' in type cast, stacktrace: #0 new Usage.fromMap (package:openai_client/src/model/shared_models/usage.dart:17:53)

I imagine it happens when no results are generated by openAI

[Azzeccagarbugli]

Hello @tomtaila, would you be able to reproduce the error and share the code snippet? Thanks a lot in advance!