java.lang.NullPointerException: Cannot invoke "Object.toString()" because the return value of "cn.dev33.satoken.stp.StpLogic.getLoginIdByToken(String)" is null
at com.example.emos.api.websocket.WebSocketService.onMessage(WebSocketService.java:64)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.eclipse.jetty.websocket.common.events.annotated.CallableMethod.call(CallableMethod.java:70)
at org.eclipse.jetty.websocket.jsr356.annotations.OnMessageTextCallable.call(OnMessageTextCallable.java:63)