use ;
/**
* Deletes a key from Redis.
*
* # Arguments
* * `conn` - A mutable reference to the Redis connection.
* * `key` - The key to delete.
*
* # Returns
* * `Ok(())` if the key was successfully deleted.
* * `Err(redis::RedisError)` if there was an error during the operation or if the key was not found.
*/
pub async