Return 404 when user or post not found

src/main/java/com/openisle/controller/GlobalExceptionHandler.java

@@ -4,6 +4,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import com.openisle.exception.FieldException;
+import com.openisle.exception.NotFoundException;
 
 import java.util.Map;
 
@@ -16,6 +17,11 @@ public class GlobalExceptionHandler {
                 .body(Map.of("error", ex.getMessage(), "field", ex.getField()));
     }
 
+    @ExceptionHandler(NotFoundException.class)
+    public ResponseEntity<?> handleNotFoundException(NotFoundException ex) {
+        return ResponseEntity.status(404).body(Map.of("error", ex.getMessage()));
+    }
+
     @ExceptionHandler(Exception.class)
     public ResponseEntity<?> handleException(Exception ex) {
         return ResponseEntity.badRequest().body(Map.of("error", ex.getMessage()));