use Zacksleo\SuningSdk\Suning;

$suning = new Suning([
    'key'        => 'key',
    'secret'     => 'secret',
    'debug'      => false,
    'log' => [
        'file'       => __DIR__.'/suning.log',
        'level'      => 'error',
        'permission' => 0777,
    ]
]);

$response = $suning->custom->logisticcompany->get(['companyName' => '申通快递',]);

$response = $suning->request([
    'suning.custom.logisticcompany.get' => 'logisticCompany'
], [
    'companyName' => '申通快递',
]);

$response = $suning->request('suning.custom.logisticcompany.get', [ 'companyName' => '申通快递' ]);

$response = $suning->request('custom.logisticcompany.get', [ 'companyName' => '申通快递', ]);

try {
    $response = $suning->custom->logisticcompany->get([
        'companyName' => '申通快递',
    ]);
} catch (\Exception $exception) {
    var_dump($exception->getMessage());
}