when openapi-python-client --install-completion, shows "Shell cmd is not supported."

[williamxhero]

C:\Users\admin>openapi-python-client --version
openapi-python-client version: 0.24.3

C:\Users\admin>openapi-python-client --install-completion
Shell cmd is not supported.

C:\Users\admin>openapi-python-client --show-completion
Shell cmd not supported.