Fix notifications for membership changes too

crates/live_kit_server/src/api.rs

@@ -12,6 +12,7 @@ pub trait Client: Send + Sync {
     async fn delete_room(&self, name: String) -> Result<()>;
     async fn remove_participant(&self, room: String, identity: String) -> Result<()>;
     fn room_token(&self, room: &str, identity: &str) -> Result<String>;
+    fn guest_token(&self, room: &str, identity: &str) -> Result<String>;
 }
 
 #[derive(Clone)]
@@ -138,4 +139,13 @@ impl Client for LiveKitClient {
             token::VideoGrant::to_join(room),
         )
     }
+
+    fn guest_token(&self, room: &str, identity: &str) -> Result<String> {
+        token::create(
+            &self.key,
+            &self.secret,
+            Some(identity),
+            token::VideoGrant::for_guest(room),
+        )
+    }
 }