use ;
/**
* Retrieves the value associated with the given key from Redis.
*
* # Arguments
* * `conn` - A mutable reference to the Redis connection.
* * `key` - The key for which the value is to be retrieved.
*
* # Returns
* * `Ok(String)` - The value associated with the key if it exists.
* * `Err(redis::RedisError)` - An error if the key does not exist or if there is an issue with the Redis connection.
*/
pub async