bug

src/modules/coupons/providers/coupon.service.ts

@@ -257,7 +257,7 @@ export class CouponService {
     return prefix + '-' + result;
   }
 
-  async generateCouponCode(restId: string){
+  async generateCouponCode(restId: string): Promise<{ code: string }> {
     const restaurant = await this.restRepository.findOne({ id: restId });
     if (!restaurant) {
       throw new NotFoundException(RestMessage.NOT_FOUND);