How to do authentication with redis in node.js?

I'm using the node_redis module and I'm not being able to determine a password for redis succesfully.

Here's my code:

var redis = require("redis"),
    client = redis.createClient(6379, "localhost"); 

client.auth("password", function (err) { if (err) throw err; }); 

Whenever I run this file in the command line I get the following message: "Redis does not require a password, but a password was supplied."

I keep getting the same error, even though I tried to change the redis.conf file that is in my computer's redis instalation:

requirepass password

Please, shed some light on the issue.