User who has never run `hub` will have commands fail when it prompts for auth

[jaymzh]

sj sclone org/repo
Cloning repo...
Traceback (most recent call last):
	6: from /usr/local/bin/sj:39:in `<main>'
	5: from /usr/local/bin/sj:39:in `load'
	4: from /opt/sugarjar/embedded/lib/ruby/gems/2.7.0/gems/sugarjar-0.0.5/bin/sj:231:in `<top (required)>'
	3: from /opt/sugarjar/embedded/lib/ruby/gems/2.7.0/gems/sugarjar-0.0.5/lib/sugarjar/commands.rb:125:in `smartclone'
	2: from /opt/sugarjar/embedded/lib/ruby/gems/2.7.0/gems/sugarjar-0.0.5/lib/sugarjar/util.rb:36:in `hub'
	1: from /opt/sugarjar/embedded/lib/ruby/gems/2.7.0/gems/mixlib-shellout-3.0.9/lib/mixlib/shellout.rb:287:in `error!'
/opt/sugarjar/embedded/lib/ruby/gems/2.7.0/gems/mixlib-shellout-3.0.9/lib/mixlib/shellout.rb:300:in `invalid!': Expected process to exit with [0], but received '1' (Mixlib::ShellOut::ShellCommandFailed)
---- Begin output of ["/snap/bin/hub", "clone", "org/repo", "repo"] ----
STDOUT: github.com username: github.com password for  (never stored):
STDERR: Must authenticate to access this API.
---- End output of ["/snap/bin/hub", "clone", "org/repo" "repo"] ----
Ran ["/snap/bin/hub", "clone", "org/repo", "repo"] returned 1