day len server theo loi Khoi noi, toi xin tuyen bo mien tru trach nhiem

src/Graphql/graphql.service.ts

@@ -30,6 +30,10 @@ export class GraphqlService {
     if (disableAuth) {
       return null
     }
+    // check if the sessionId is valid
+    if (!sessionId) {
+      return null
+    }
     // redis context cache
     const cachedUser = await this.redis.getUser(sessionId)
     if (cachedUser) {