diff --git a/api/src/main/java/lab/en2b/quizapi/auth/config/UserDetailsImpl.java b/api/src/main/java/lab/en2b/quizapi/auth/config/UserDetailsImpl.java
index ae68bccf..88553faa 100644
--- a/api/src/main/java/lab/en2b/quizapi/auth/config/UserDetailsImpl.java
+++ b/api/src/main/java/lab/en2b/quizapi/auth/config/UserDetailsImpl.java
@@ -58,4 +58,8 @@ public boolean equals(Object o) {
         UserDetailsImpl user = (UserDetailsImpl) o;
         return Objects.equals(id, user.id);
     }
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, username, email, password, authorities);
+    }
 }