I'm trying to make a simple custom Minecraft launcher thing.
According to the Minecraft Wiki page for the Launcher, it should be possible to run the Minecraft launcher using username and password prefixes from the command line and go directly to the game instead of through the launcher.
I've tried various versions of , and what it says is the old method:
The old method opens the minecraft launcher, just as if I double clicked the jar file, however it does not go directly to the menu screen.
The new way (using password and username as prefix), gives me an error message saying the .
Any help on this?
I'm really stuck.