使用咱们官方提供的php V3接口，调取用户的unionid时，报以下错误

{"code":"INVALID_REQUEST","message":"UnionID为空"}

请求示例数据

// 构造一个 APIv3 客户端实例
$instance = Builder::factory([
    'mchid' => $merchantId,
    'serial' => $merchantCertificateSerial,
    'privateKey' => $merchantPrivateKeyInstance,
    'certs' => [
        $platformCertificateSerial => $platformPublicKeyInstance,
    ],
]);

$resp = $instance->chain('v3/facemch/users/9502ca24-d7e2-48d7-812f-ee6512cfa591_rt1')
    ->get(
        ['query' =>
            [
                'info_type' => 'ASK_UNIONID',
                'appid' => 'wx111283e02891dbe9',//服务商公众号
                'sub_mchid' => '1586753301',//子商户号
            ]
        ]
    );