Fix auth guard user id extractor

src/auth.guard.ts

@@ -40,8 +40,11 @@ export class AuthGuard implements CanActivate {
       const payload = await this.jwtService.verifyAsync(token, {
         secret: this.jwtSecret,
       });
+      if (!payload.userId) {
+        throw 'Unauthorised';
+      }
 
-      request['user'] = payload;
+      request['userId'] = payload.userId;
     } catch {
       throw new UnauthorizedException();
     }