diff --git a/src/main/java/com/example/authentication/Sau02f220uService.java b/src/main/java/com/example/authentication/Sau02f220uService.java
new file mode 100644
index 0000000..7bc9e0a
--- /dev/null
+++ b/src/main/java/com/example/authentication/Sau02f220uService.java
@@ -0,0 +1,10 @@
+package com.example.authentication;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class Sau02f220uService {
+    public void authenticate(Sau02f220uDto dto) {
+        // Authentication logic here
+    }
+}
\ No newline at end of file