Failed to AUTH connection if using redis cache with using Password widget isn't showing

[scretchy]

RedisException: Failed to AUTH connection in /var/www/vhosts/your-domain.com/httpdocs/lib/Credis/Client.php:938

#0 /var/www/vhosts/your-domain.com/httpdocs/lib/Credis/Client.php(938): Redis->info()
#1 /var/www/vhosts/your-domain.com/httpdocs/app/code/community/Hackathon/MageMonitoring/Model/Widget/CacheStat/Redis.php(48): Credis_Client->__call('info', Array)