Why HmGet().Result() not return error of pb.Nil?

[Harlan6]

for example:
result, err := redis.RedisFacade().Client.HMGet(context.Background(), "aaafdfewr", "bb").Result()
fmt.Println(sliceCmd.Err() == redis.Nil)

Q:
I query a not exist key ,but "sliceCmd.Err() == redis.Nil" return false ,I just want to know when hash key not exist,is there any other method ?

[vmihailenco]

See https://redis.uptrace.dev/guide/server.html#redis-nil and https://redis.io/commands/HMGET