fix add endpoint

src/main/java/com/dino/scrum/sysmag/controller/ProductController.java

@@ -42,16 +42,15 @@ public class ProductController {
 
     @PostMapping(value = "/product/add")
     public @ResponseBody
-    String addProduct(@RequestBody Product product){
-        productService.addProduct(product);
-        return "Jak się bawisz Kondradzie?";
+    Product addProduct(@RequestBody Product product){
+        return productService.addProduct(product);
     }
 
     @DeleteMapping(value = "/product/delete")
     public @ResponseBody
     String deleteProduct(@RequestBody IdDto id){
         productService.deleteProduct(id.getId());
-        return "(y)";
+        return "Deleted" + id;
     }
 
     @GetMapping(value = "/product/get-by-id")

src/main/java/com/dino/scrum/sysmag/service/ProductService.java

@@ -15,6 +15,6 @@ public interface ProductService {
     Product changeQuantity(QuantityChange quantityChange);
     Product getById(Long id);
     float getPriceOfAllProducts();
-    void addProduct(Product product);
+    Product addProduct(Product product);
     void deleteProduct(long id);
 }

src/main/java/com/dino/scrum/sysmag/service/ProductServiceImpl.java

@@ -63,8 +63,8 @@ public class ProductServiceImpl implements ProductService {
     }
 
     @Override
-    public void addProduct(Product product) {
-        productRepository.save(product);
+    public Product addProduct(Product product) {
+        return productRepository.save(product);
     }
 
     @Override