Print usage on input without commands/args/flags #33

In the scenario of app invocation from terminal without any command/flags

> my-app

I'd expect the same output of:

> my-app --help

Instead, I have the error about the missing command.

my-app: error: expected one of "cmd1", "cmd2"

Is there a way/configuration to achieve my expected outcome?

The closest function I've found is kong.UsageOnError(), except it prints usage help for any error (when for any other type of error I'd expect to just print the specific error).