The \Sammyjo20\Saloon\Helpers\URLHelper::join() method does not respect a full URL in the $endpoint argument but still prefixes it with the $baseUrl.
Some APIs have a few endpoints on another base URL/domain. I would like to override the default base URL with a full URL in the request endpoint instead of creating a whole new connector.

The already used filter_var($endpoint, FILTER_VALIDATE_URL) could be used to early return in case the $endpoint is already a full and valid URL. Possibly also combined with parse_url() to check scheme and host are defined.

Right now I'm running in the following curl error which fully bubbles through all layers. Even with the AlwaysThrowsOnErrors trait it fully bubbles through and doesn't get wrapped up in a \GuzzleHttp\Exception\ConnectException or similar.

cURL error 6: Could not resolve host: api.steampowered.comhttps (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://api.steampowered.comhttps//steamcommunity.com/actions/QueryLocations?key=xyz&format=json

class SteamConnector extends SaloonConnector
{
    public function defineBaseUrl(): string
    {
        return 'https://api.steampowered.com';
    }
}

class QueryLocationsRequest extends SaloonRequest
{
    protected ?string $method = 'GET';

    public function defineEndpoint(): string
    {
        $query = '';

        if ($this->countryCode) {
            $query .= "/{$this->countryCode}";

            if ($this->stateCode) {
                $query .= "/{$this->stateCode}";
            }
        }

        return "https://steamcommunity.com/actions/QueryLocations{$query}";
    }
}