fix some bug and produce many problem to solve later

src/Message/message.schema.ts

@@ -118,22 +118,17 @@ export class MessageSchema extends PothosSchema {
       }),
     }))
 
-    // subscriptions
-    /* The code snippet `subscriptions` is currently commented out in the provided TypeScript class. It
-    appears to be a placeholder or a section where subscription-related logic or fields could be
-    defined. In GraphQL, subscriptions are used to listen for real-time events or changes in data
-    and receive updates when those events occur. */
-
     this.builder.subscriptionFields((t) => ({
       messageSent: t.field({
-        subscribe: (_, __, ctx) => {
+        description: 'Subscribe to messages sent by users.',
+        args: {},
+        subscribe: async (_, __, ctx) => {
           if (!ctx.isSubscription) {
             throw new Error('Not allowed')
           }
-          return {
-            [Symbol.asyncIterator]: () =>
-              ctx.websocket.pubSub.asyncIterator('MESSAGE_SENT'),
-          }
+          return (await ctx.websocket.pubSub.asyncIterator(
+            'MESSAGE_SENT',
+          )) as unknown as AsyncIterable<unknown>
         },
         type: this.message(), // Add the type property
         resolve: (payload) =>