Immersion

### What happened? [08:55:07 INFO]: [FastLogin] New incoming packet START[class=ServerboundHelloPacket, id=0] from UNKNOWN[/95.24.53.229:8217] [08:55:07 ERROR]: [FastLogin] Failed to check premium state of Wolk7778 java.lang.NullPointerException: null at FastLoginBukkit.jar/fastlogin.guava.base.Preconditions.checkNotNull(Preconditions.java:903) ~[FastLoginBukkit.jar:?] at FastLoginBukkit.jar/fastlogin.guava.cache.LocalCache.put(LocalCache.java:4242)...