[R9] Find user by login use case class

src/main/java/com/mirna/hospitalmanagementapi/application/usecase/user/FindUserByLoginUseCase.java

@@ -0,0 +1,33 @@
+package com.mirna.hospitalmanagementapi.application.usecase.user;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.stereotype.Component;
+
+import com.mirna.hospitalmanagementapi.domain.entities.Doctor;
+import com.mirna.hospitalmanagementapi.domain.repositories.auth.UserRepository;
+
+/**
+ * This class is used to execute the findUserByLogin method 
+ * 
+ * @author Mirna Gama
+ * @version 1.0
+ */
+@Component
+public class FindUserByLoginUseCase {
+
+	@Autowired
+	private UserRepository userRepository;
+	
+	/**
+	 * Executes the findUserByLogin method from User repository
+	 * 
+	 * @param login A string representing the user's system login
+	 * 
+	 * @return The corresponding user information if successful, or null if it is non-existent
+	 *
+	 */
+	public UserDetails execute(String login) {
+		return userRepository.findUserByLogin(login);
+	}
+}