Language school user

application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/user/UserController.java

@@ -62,7 +62,7 @@ public class UserController {
     }
 
     @PostMapping("/login")
-    public String login(@RequestBody UserLoginDto dto) {
+    public String login(@Valid @RequestBody UserLoginDto dto) {
         return String.format("User %s has spawned", dto.getUsername());
     }