Support password/token prompt

[afeld]

For users who might not want their password/token in their command history, --password/--token without a value should give a prompt that hides the input.

http://stackoverflow.com/questions/2338889/how-to-hide-password-input-from-terminal-in-ruby-script

[jkitchin]

http://stackoverflow.com/questions/2338889/how-to-hide-password-input-from-terminal-in-ruby-script

[tarebyte]

I'll take this one, sounds like fun :smile:

[tarebyte]

@afeld right now on my branch if the user doesn't enter a token or password they are given a menu.

Please choose whether to give your password or GitHub token
1. Password
2. Token

From there, it will give them a hidden prompt to enter in the credentials.

Is this functionality you were looking for?