It's now possible for premium players to bypass authentication by using FastLoginalong with this plugin. With the /premium command, premium players will be able to auto-log in without the need for a password.
Important: At least in my testing server, the current FastLogin version on the SpigotMC page showed a couple of bugs. For this reason, I recommend using the latest FastLogin development build(Currently #964) instead.
Full Changelog:
- Added support for FastLogin, enabling premium players to be logged in automatically. - Nothing else, really. 8)