diff --git a/src/main/java/com/pt/service/UserService.java b/src/main/java/com/pt/service/UserService.java
new file mode 100644
index 0000000..7025e5a
--- /dev/null
+++ b/src/main/java/com/pt/service/UserService.java
@@ -0,0 +1,45 @@
+package com.pt.service;
+
+import com.pt.entity.User;
+import com.pt.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    public UserService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    public User findByUsername(String username) {
+        return userRepository.findByUsername(username);
+    }
+
+    public User findByEmail(String email) {
+        return userRepository.findByEmail(email);
+    }
+
+    public User findByUsernameAndPassword(String username, String password) {
+        return userRepository.findByUsernameAndPassword(username, password);
+    }
+
+    public User findByEmailAndPassword(String email, String password) {
+        return userRepository.findByEmailAndPassword(email, password);
+    }
+
+    public User save(User user) {
+        return userRepository.save(user);
+    }
+
+    public User findById(String uid) {
+        return userRepository.findById(uid).orElse(null);
+    }
+
+    public void deleteById(String uid) {
+        userRepository.deleteById(uid);
+    }
+}