No changes

src/main/java/com/nisum/bookstore/dto/UserDto.java

+package com.nisum.bookstore.dto;
+
+import lombok.*;
+
+@Data
+@Getter
+@Setter
+@Builder
+public class UserDto {
+    public String id;
+    public String name;
+    public int age;
+    public int gender;
+}

src/main/java/com/nisum/bookstore/exceptions/BookNotFoundException.java

@@ -9,4 +9,5 @@ public class BookNotFoundException {
     public static <T> Mono<T> monoResponseBookNotFoundException( String id ) {
         return Mono.error(new ResponseStatusException(HttpStatus.NOT_FOUND, "Book ["+ id + "] not found"));
     }
+
 }