Refactor: mappers struct.

@@ -40,0 +47,4 @@
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<Map<String, String>> handleValidationExceptions(
+            MethodArgumentNotValidException ex) {
+        Map<String, String> errors = new HashMap<>();

@@ -40,0 +53,4 @@
+            String errorMessage = error.getDefaultMessage();
+            errors.put(fieldName, errorMessage);
+        });
+        return new ResponseEntity<>(errors, HttpStatus.BAD_REQUEST);

@@ -0,0 +1,4 @@
+package ru.team58.profileservice.controller.exceptions;
+
+public class IncorrectEmailException extends BadRequestException {
+}

@@ -0,0 +24,4 @@
+
+    @NotBlank(message = "First name cannot be empty")
+    @Pattern(regexp = "^[a-zA-Zа-яА-Я]*$", message = "First name can contain only letters")
+    @Size(min = 3, max = 255, message = "First name must be bigger than 3 and less than 255")

@@ -0,0 +10,4 @@
+    UserResponseMapper INSTANCE = Mappers.getMapper(UserResponseMapper.class);
+
+    UserResponse toUserResponse(UserDTO dto);
+}

@@ -1,6 +1,7 @@
 package ru.team58.profileservice.persistence.entity;
 
 import jakarta.persistence.*;
+import jakarta.validation.constraints.*;