public function verify($accountId, $file, $purpose)
    {
        $upload = (new FileUploads($this->config))->create(
            $file, $purpose, [ 'Stripe-Account' => $accountId ]
        );

        $this->update($accountId, [
            'legal_entity' => [
                'verification' => [
                    'document' => $upload['id'],
                ],
            ],
        ]);

        return $this->_get('accounts/'.$accountId);
    }