diff --git a/src/main/java/fr/plil/sio/web/mvc/SecurityServiceImpl.java b/src/main/java/fr/plil/sio/web/mvc/SecurityServiceImpl.java
index 45ee9a5..ebdc49b 100644
--- a/src/main/java/fr/plil/sio/web/mvc/SecurityServiceImpl.java
+++ b/src/main/java/fr/plil/sio/web/mvc/SecurityServiceImpl.java
@@ -14,10 +14,11 @@ public class SecurityServiceImpl implements SecurityService{
 
     @Override
     public String findLoggedInUsername() {
-        Object userDetails = SecurityContextHolder.getContext().getAuthentication().getDetails();
+        Object userDetails = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
         if (userDetails instanceof UserDetails) {
             return ((UserDetails)userDetails).getUsername();
         }
+        logger.warn("cannot find logged user");
         return null;
     }
 }
\ No newline at end of file
--
libgit2 0.21.2