diff --git a/src/main/java/com/mirna/hospitalmanagementapi/application/services/UserServiceImpl.java b/src/main/java/com/mirna/hospitalmanagementapi/application/services/UserServiceImpl.java
new file mode 100644
index 0000000..3b3a507
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/application/services/UserServiceImpl.java
@@ -0,0 +1,36 @@
+package com.mirna.hospitalmanagementapi.application.services;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.stereotype.Service;
+
+import com.mirna.hospitalmanagementapi.application.usecase.user.FindUserByLoginUseCase;
+import com.mirna.hospitalmanagementapi.domain.services.UserService;
+
+/**
+ * This class is an implementation of the UserService interface.
+ *
+ * This class provides methods to perform operations on User entity
+ *
+ * @author Mirna Gama
+ * @version 1.0
+ */
+
+@Service
+public class UserServiceImpl implements UserService {
+
+	@Autowired
+	private FindUserByLoginUseCase findUserByLogin;
+	
+	/**
+   	* Finds a stored user information by login.
+   	* 
+   	* @param id A long representing the user's system login
+   	* @return The corresponding user information if successful, or null if it is non-existent.
+   	*/
+	@Override
+	public UserDetails findUserByLogin(String login) {
+		return findUserByLogin.execute(login);
+	}
+
+}
diff --git a/src/main/java/com/mirna/hospitalmanagementapi/domain/services/UserService.java b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/UserService.java
new file mode 100644
index 0000000..28f90e3
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/UserService.java
@@ -0,0 +1,22 @@
+package com.mirna.hospitalmanagementapi.domain.services;
+
+import org.springframework.security.core.userdetails.UserDetails;
+
+/**
+ * User service interface for managing user information.
+*
+ * @see User
+ * @author Mirna Gama
+ * @version 1.0
+*/
+public interface UserService {
+
+	/**
+   	* Finds a stored user information by login.
+   	* 
+   	* @param id A long representing the user's system login
+   	* @return The corresponding user information if successful, or null if it is non-existent.
+   	*/
+    public UserDetails findUserByLogin(String login);
+    
+}