Password doens't get passed down to redis cluster members

[anlutro]

We're using GCP Memorystore Redis Cluster. The way this works is you know its main IP and connect on port 6379, but may be MOVED to another arbitrary IP/port. We don't know the members of the cluster up-front, and rely on CLUSTER SHARDS to find the members of the cluster.

This works fine with predis, unless we need to authenticate. It seems like whenever there's a MOVED response from the Redis server, the newly created connection loses its password attribute.

To Reproduce

1. Set up a Redis Cluster which requires password authentication.
2. Run the PHP code snippet below. It may work some of the times, but will fail other times.

<?php
require 'vendor/autoload.php';
// this only works in GCE/GKE, but bug should be reproducible with any arbitrary password
$ch = curl_init("http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["Metadata-Flavor: Google"]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true)
$token = json_decode(curl_exec($ch))->access_token;

$client = new Predis\Client(
	[["proto" => "tcp", "host" => "redis-cluster", "port" => 6379, "password" => $token]],
	["cluster" => "redis", ["parameters" => ["password" => $token]]]
);
$client->set("tmp_test", "it works", "EX", 60);
echo $client->get("tmp_test");

Expected behavior
Connections instantiated by RedisCluster should take its password from $parameters["password"], or at least inherit the password attribute from the RedisCluster object itself.

Versions (please complete the following information):

• Predis: 2.2.2
• PHP 8.2.19
• Redis Server 7.0.15 (according to redis-cli info, but it is GCP Memorystore)
• Alpine Linux 3.19.1