Adding an 'empty' user is possible with drone-cli

[frebib]

$ drone user ls
frebib
$ drone user add             
Successfully added user
$ drone user ls

frebib

It seems to be possible that when executing the above commands, a user with an empty name is created. It doesn't however seem possible to delete that user in the same manner. In executing this command I was expecting the implicit --help to show up, but instead I got this.

Realistically this should be guarded against on the server side, hence why I'm opening this issue here, but I suppose the cli should also prevent the user from doing this. In this situation (and this applies to all drone-cli subcommands) I would expect the cli to show usage for the subcommand and exit 1 when a non-optional argument is not provided such as the username in this case.

[bradrydzewski]

this was fixed in 1.2.1