Session ID is censored

I open my minecraft launcher and when i try to play it says launching and then it just crashes and gives me this error:
Completely ignored arguments: [--nativeLauncherVersion, 1206]
[17:04:42] [Client thread/INFO]: Setting user: Unai_S_Cool_YT
[17:04:42] [Client thread/INFO]: (Session ID is <censored>)
[17:04:44] [Client thread/INFO]: LWJGL Version: 2.9.4