NCP-3 add exception,add change password logic, fix checkauthtoken

src/main/java/ru/soune/no_copy/service/UserService.java

@@ -0,0 +1,28 @@
+package ru.soune.no_copy.service;
+
+import lombok.AllArgsConstructor;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+import ru.soune.no_copy.dto.ChangePasswordRequest;
+import ru.soune.no_copy.entity.User;
+import ru.soune.no_copy.exception.NotValidationPasswordException;
+import ru.soune.no_copy.repository.UserRepository;
+
+@Service
+@AllArgsConstructor
+public class UserService {
+
+    private final UserRepository userRepository;
+
+    private final PasswordEncoder passwordEncoder;
+
+    public User changePassword(User user, ChangePasswordRequest request) {
+        if (!passwordEncoder.matches(request.getCurrentPassword(), user.getPassword())) {
+            throw new NotValidationPasswordException("Current password is incorrect");
+        }
+
+        user.setPassword(passwordEncoder.encode(request.getNewPassword()));
+
+        return userRepository.save(user);
+    }
+}