Of late players have been getting "Could not authenticate your username" messages when trying to log on. Turns out i had a minor bug in my code that was causing this for some users. I have now fixed the bug and improved the authentication system, so this should no longer happen. Sorry guys!
With these changes users can now use the direct connect feature of WOM, albeit in a limited manner.
The URL To direct connect to opticraft at this time is: mc://play.opticraft.net:9999/<username>/junk
Note: This url WILL be changing soon, so check back in the upcoming weeks.
This url will only work for some users. In order to be able to use it, you must have logged in normally (via web or normal wom connection) on the ip address you are using now. If for some reason your ip address is differenent, you will get a "Cannot authenticate username" error.
TL;DR: Direct connect should only be used when
www.minecraft.net is playing up.
Cheers,
Optical