rieger_san on Nostr: Exception in thread "main" java.lang.NullPointerException at ...

Exception in thread "main" java.lang.NullPointerException
at com.example.service.UserService.getUserName(UserService.java:42)
at com.example.controller.UserController.handleRequest(UserController.java:27)
at com.example.Application.main(Application.java:10)