main.go

package main

import (
	"context"
	"fmt"

	"github.com/go-redis/redis/v8"
)

func main() {
	var ctx = context.Background()

	rdb := redis.NewClient(&redis.Options{})

	err := rdb.Set(ctx, "key", "value", 0).Err()
	if err != nil {
		panic(err)
	}

	val, err := rdb.Get(ctx, "key").Result()
	if err == redis.Nil {
		fmt.Println("key does not exist")
	} else if err != nil {
		panic(err)
	} else {
		fmt.Println(val)
	}
}