Functionality done

buisnesslogic/src/main/java/com/plannaplan/services/UserService.java

@@ -49,4 +49,8 @@ public class UserService {
         return this.repo.searchForUsers(query, UserRoles.STUDENT);
     }
 
+    public Optional<User> getById(Long userId) {
+        return this.repo.findById(userId);
+    }
+
 }