[BUG] pyflyte run fails on Windows

[jboutwell-rva]

Running the following in the command prompt fails:
pyflyte run --remote example.py training_workflow --hyperparameters "{\"C\": 0.1}"

Error:
{"asctime": "2023-03-11 11:32:20,895", "name": "flytekit", "levelname": "WARNING", "message": "FlyteSchema is deprecated, use Structured Dataset instead."} Failed with Exception: Reason: SYSTEM:Unknown Underlying Exception: cannot find context for 'fork'

The example is taken from https://docs.flyte.org/projects/cookbook/en/latest/index.html.

The error appears to be caused by this line:
https://github.com/flyteorg/flytekit/blob/master/flytekit/clients/auth/auth_client.py#L308

The python multiprocessing docs indicate only "spawn" is supported on Windows, and as of 3.8 is also recommended for macOS.

Version Info
Windows 10
Python 3.10.10
flytekit-1.4.1

The same example works for me on macOS.

[welcome]

Thank you for opening your first issue here! 🛠

[github-actions]

Hello 👋, this issue has been inactive for over 9 months. To help maintain a clean and focused backlog, we'll be marking this issue as stale and will engage on it to decide if it is still applicable.
Thank you for your contribution and understanding! 🙏

[eapolinario]

flyteorg/flytekit#2626 is going to fix this.