fix: close SSE stream when error occurred

src/controllers/auth/anilist/index.ts

@@ -212,7 +212,8 @@ app.openapi(route, async (c) => {
     async (err, stream) => {
       console.error("Error occurred in SSE");
       console.error(err);
-      stream.writeln("An error occurred");
+      await stream.writeln("An error occurred");
+      await stream.close();
     },
   );
 });