ADD ALOT OF POLISHING AND UPDATES...

walkguide-backend/demo/src/test/java/com/walkguide/controller/PairingControllerTest.java

@@ -92,9 +92,9 @@ class PairingControllerTest {
             sh.when(SecurityHelper::getCurrentUserId).thenReturn(2L);
 
             InviteUserRequest req = new InviteUserRequest();
-            req.setUniqueUserId("INVALID999");
+            req.setPairingCode("BAD99999");
 
-            when(pairingService.inviteUser(2L, "INVALID999"))
+            when(pairingService.inviteUser(2L, "BAD99999"))
                     .thenThrow(new RuntimeException("User dengan ID tersebut tidak ditemukan"));
 
             mockMvc.perform(post("/api/v1/shared/pairing/invite")