[R9] User jpa repository with custom method to find user by login

src/main/java/com/mirna/hospitalmanagementapi/domain/repositories/auth/UserRepository.java

@@ -0,0 +1,22 @@
+package com.mirna.hospitalmanagementapi.domain.repositories.auth;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import com.mirna.hospitalmanagementapi.domain.entities.auth.User;
+
+/**
+ * Repository interface for retrieving and manipulating all User objects using their unique Long identifier.
+*
+ * @author Mirna Gama
+* @version 1.0
+*/
+public interface UserRepository extends JpaRepository<User, Long>{
+
+	/**
+	 * 
+	 * @param login A string representing the user's system login
+	 * @return The corresponding user information if successful, or null if it is non-existent
+	 */
+	UserDetails findUserByLogin(String login);
+}