Error 401 (Unauthorized)

### What version of `ReactiveSearch API` are you using ?

Lastest

### What issue did you run into?

When configuring a remote elasticsearch the variables found in config/docker.env (username and password) don't work, I had to put the credentials in the url. Is there a way to not have to pass the credentials through the url?

### What did you expect to see?
```bash
ES_CLUSTER_URL=https://my-elastic.com
USERNAME=username
PASSWORD=password
```

### What did you see instead?
```bash
ES_CLUSTER_URL=https://username:password@my-elastic.com
```

Commencez par config/docker.env et suivez la manière dont ES_CLUSTER_URL, USERNAME et PASSWORD sont utilisés lors de la configuration d’un cluster Elasticsearch distant. Vérifiez que les variables d’identifiants distinctes permettent une authentification réussie sans nécessiter d’identifiants dans l’URL.

Rédigé par le modèle d'indexation à partir du texte de l'issue.