Failed to authenticate with the Redisd server

[limingxinleo]

use Phalcon\Cache\Backend\Redis as BackRedis;
$cache = new BackRedis(
                $frontCache,
                [
                    'host' => $config->redis->host,
                    'port' => $config->redis->port,
                    'auth' => $config->redis->auth,
                    'persistent' => $config->redis->persistent,
                    'index' => $config->redis->index,
                    'prefix' => ':cache:',
                    'statsKey' => '_PHCM',
                ]
            );

Details

When I use cache service by redis and my redis auth is null.
Failed to authenticate with the Redisd server

phalcon/cache/backend/redis.zep

		if fetch auth, options["auth"] {
			let success = redis->auth(auth);

			if !success {
				throw new Exception("Failed to authenticate with the Redisd server");
			}
		}

I think, if auth is null ,not �execute redis->auth(auth);

• Phalcon version: 3.0.4
• PHP Version: 7.0.15
• Operating System:
• Installation type: Compiling from source || installing via package manager
• Zephir version (if any):
• Server: Nginx | Apache | Other
• Other related info (Database, table schema):

[sergeyklay]

Fixed in the 3.2.x branch. Feel free to open new issue if the problem appears again. Thank you for contributing.