diff --git a/src/main/java/com/mirna/hospitalmanagementapi/application/services/auth/AuthServiceImpl.java b/src/main/java/com/mirna/hospitalmanagementapi/application/services/auth/AuthServiceImpl.java
new file mode 100644
index 0000000..e93cd3f
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/application/services/auth/AuthServiceImpl.java
@@ -0,0 +1,41 @@
+package com.mirna.hospitalmanagementapi.application.services.auth;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.stereotype.Service;
+
+import com.mirna.hospitalmanagementapi.domain.dtos.auth.UserLoginDTO;
+import com.mirna.hospitalmanagementapi.domain.services.auth.AuthService;
+
+/**
+ * This class is an implementation of the AuthService interface.
+ *
+ * This class provides methods to perform operations on users registration and authentication
+ *
+ * @author Mirna Gama
+ * @version 1.0
+ */
+@Service
+public class AuthServiceImpl implements AuthService {
+
+	@Autowired
+	private AuthenticationManager manager;
+
+	/**
+   	* Performs the user login
+   	* 
+   	* @param userLoginDTO Data transfer object containing user credentials for login
+   	* @return A fully authentication object including the credentials
+   	*/
+	@Override
+	public Authentication login(UserLoginDTO userLoginDTO) {
+		UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(userLoginDTO.login(), 
+				userLoginDTO.password());
+		
+		return manager.authenticate(token);
+	}
+	
+	
+}
diff --git a/src/main/java/com/mirna/hospitalmanagementapi/domain/services/auth/AuthService.java b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/auth/AuthService.java
new file mode 100644
index 0000000..657d4d6
--- /dev/null
+++ b/src/main/java/com/mirna/hospitalmanagementapi/domain/services/auth/AuthService.java
@@ -0,0 +1,23 @@
+package com.mirna.hospitalmanagementapi.domain.services.auth;
+
+import org.springframework.security.core.Authentication;
+
+import com.mirna.hospitalmanagementapi.domain.dtos.auth.UserLoginDTO;
+
+/**
+ * Authentication service interface for managing authentication and registration.
+*
+ * @see User
+ * @author Mirna Gama
+ * @version 1.0
+*/
+public interface AuthService {
+
+	/**
+   	* Performs the user login
+   	* 
+   	* @param userLoginDTO Data transfer object containing user credentials for login
+   	* @return A fully authentication object including the credentials
+   	*/
+	public Authentication login(UserLoginDTO userLoginDTO);
+}