Fix: check if HGetAll is found

 In the context of Redis, the `HGETALL` command is used to retrieve all the fields and values of a hash. To check if `HGETALL` returns any results, you can use the following methods, depending on the programming language or client library you are using to interact with Redis:

**1. Redis CLI (Command-Line Interface):**

In the Redis command-line interface, you can execute the `HGETALL` command and check if it returns any results. If it returns an empty list, it means that the hash is empty, and there are no fields and values to retrieve.

```shell

127.0.0.1:6379> HGETALL your_hash_key

(empty list or set)

```

**2. Using Redis Clients in Different Programming Languages:**

If you are using a Redis client library in a specific programming language (e.g., Python, JavaScript, etc.), you can use the library's functions to check the response. Here's an example in Python using the `redis-py` library:

```python

import redis

# Connect to Redis

r = redis.StrictRedis(host='localhost', port=6379, db=0)

# Specify the hash key

hash_key = 'your_hash_key'

# Use HGETALL to retrieve the hash fields and values

result = r.hgetall(hash_key)

if not result:

    print("The hash is empty.")

else:

    print("The hash is not empty. Here are the fields and values:")

    for field, value in result.items():

        print(f"{field}: {value.decode('utf-8')}")

```

This Python code checks if the `HGETALL` operation returned any results and prints the contents of the hash if it's not empty.

The specific method may vary depending on the Redis client library you're using, so you should refer to the documentation for the client library in your chosen programming language for more details on how to check the results of the `HGETALL` operation.