bug fixed

src/redis/redis.service.ts

@@ -1,9 +1,9 @@
 import { Injectable, OnModuleInit } from '@nestjs/common';
-import { createClient } from 'redis';
+import { createClient, RedisClientType } from 'redis';
 
 @Injectable()
 export class RedisService implements OnModuleInit {
-  private client;
+  private client: RedisClientType;
 
   async onModuleInit() {
     this.client = createClient({