未定义的偏移量：0，带有LARAVEL 5.6和GuzzleHttp POST请求

Question

能帮我吗，我想将UBER API与GuzzleHttp一起使用

    $uber_client = new Client([
        'base_uri' => 'https://api.uber.com/v1.2/',
        'timeout'  => 2.0,
        'headers' => [
            'content_type' => 'application/json',
            'Accept-Language' => 'fr_FR',
            'Authorization' => "Bearer $uber_access_token"],
    ]);

提出乘车要求-估算：

        $resp_uber = $uber_client->post("requests/estimate", [
        'auth' => [
            'Authorization' => "Bearer $uber_access_token"
            ],
        'form_params' =>   [
            'start_latitude' => $start_latitude,
            'start_longitude' => $start_longitude,
            'end_latitude' => $end_latitude,
            'end_longitude' => $end_longitude,
            ]
    ]);

=> Erreur：

  

ErrorException（E_NOTICE）   未定义的偏移量：0