[15:57:04] [Server thread/WARN]: **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE! [15:57:04] [Server thread/WARN]: The server will make no attempt to authenticate usernames. Beware. [15:57:04] [Server thread/WARN]: While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose. [15:57:04] [Server thread/WARN]: To change this, set "online-mode" to "true" in the server.properties file.