@senk-ju, i want join to a server with custom auth-server (full custom launcher).
I have information from my friends what some players join to server with TLauncher.
Now i have a session-id in launcher and i want change my id to true-id in TLauncher.
I would say what im want join to custom server with self launcher (without mods) from TLauncher
p.s: @Senk-Ju, i send u PM about all situation