Singleton pattern for Redis connection

Question

Recently I have learned about singleton design pattern. I have tried to implement Redis connection following singleton design pattern.

conn/redis.go

package conn

import (
    "sync"

    "github.com/go-redis/redis"
)

// Redis client
type Redis struct {
    *redis.Client
}

var redisInstance *Redis
var once sync.Once

func GetRedis() *Redis {
    once.Do(func() {
        cfg := config.Redis()

        redisInstance = &Redis{
            Client: redis.NewClient(&redis.Options{
                Addr:     cfg.Address,
                Password: cfg.Password,
                DB:       cfg.DB,
            }),
        }
    })

    return redisInstance
}