diff --git a/src/service/notification.rs b/src/service/notification.rs
index 9b561ef781b390aba8e3aa75a5b89a1c2fbb692a..3292bf3d8d6df564407388ae329d43f4457af245 100644
--- a/src/service/notification.rs
+++ b/src/service/notification.rs
@@ -10,4 +10,10 @@ use std::thread;
  pub struct NotificationService;
  
  impl NotificationService {
+    pub fn subscribe(product_type: &str, subscriber: Subscriber) -> Result<Subscriber> {
+        let product_type_upper: String = product_type.to_uppercase();
+        let product_type_str: &str = product_type_upper.as_str();
+        let subscriber_result: Subscriber = SubscriberRepository::add(product_type_str, subscriber);
+        return Ok(subscriber_result);
+    }
  }
\ No newline at end of file