Hi,
I wanted to update a project member and got an error using this:
vm-lm-deb64:~# gitlab project-member update --project-id=18 --user-id=2 --access-level=30
Missing --id argument
Solution: Use "--id" instead of "--user-id", though the help text suggests otherwise. It would be better to stay consistent with the other subcommands and change this "--user-id".