Auth0\SDK\API\Management\DeviceCredentials::getAll PHP Method

    public function getAll($user_id = null, $client_id = null, $type = null, $fields = null, $include_fields = null)
    {
        $request = $this->apiClient->get()->addPath('device-credentials');
        if ($fields !== null) {
            if (is_array($fields)) {
                $fields = implode(',', $fields);
            }
            $request->withParam('fields', $fields);
        }
        if ($include_fields !== null) {
            $request->withParam('include_fields', $include_fields);
        }
        if ($user_id !== null) {
            $request->withParam('user_id', $user_id);
        }
        if ($client_id !== null) {
            $request->withParam('client_id', $client_id);
        }
        if ($type !== null) {
            $request->withParam('type', $type);
        }
        return $request->call();
    }