Laravel with Amazon AWS SQS

I've changed the queue driver over to AWS SQS in a Laravel 5.1 project, but now whenever the queue is called I get...

Type error: Argument 1 passed to Aws\Common\Client\AbstractClient::__construct() must be an instance of Aws\Common\Credentials\CredentialsInterface, array given, called in /home/vagrant/Code/ukisug/vendor/laravel/framework/src/Illuminate/Queue/Connectors/SqsConnector.php on line 26

Any ideas?

via Chebli Mohamed