[9.x] Add username option for phpredis with redis ACL (#41683)

* Update PhpRedisConnector.php

Allow to use username and password string for phpredis connection, instead of a password array.
Fix laravel crash if different environement (ex: one server with ACL, one with just a password), have to edit database.php to use an array in password field. Now you can use username and password.

* Update PhpRedisConnector.php

* formatting

* remove whitespace

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Redis/Connectors/PhpRedisConnector.php

@@ -84,7 +84,11 @@ protected function createClient(array $config)
  $this->establishConnection($client, $config);
 
  if (! empty($config['password'])) {
- $client->auth($config['password']);
+ if (isset($config['username']) && is_string($config['password'])) {
+ $client->auth([$config['username'], $config['password']]);
+ } else {
+ $client->auth($config['password']);
+ }
  }
 
  if (isset($config['database'])) {