Symfony 3.1

When I use my proper cache backend such as Redis in the Cache component and provide a default_redis_provider like as below, the password use to establish the connection is wrong :

# app/config/config_prod.yml
framework:
    cache:
        app: cache.adapter.redis
        default_redis_provider: "redis://e:password@ec2-23-217-18-82.eu-west-1.compute.amazonaws.com:21039"

e:password is used as the password insteed of password.