Could anyone share a connection configuration for Ontotext GraphDB?

Mine is as below:

$databases['sparql_default']['default'] = [
  'prefix' => '',
  'host' => '127.0.0.1',
  'port' => '7200',
  //'namespace' => 'Drupal\\Driver\\Database\\sparql',
  'namespace' => 'Drupal\\sparql_entity_storage\\Driver\\Database\\sparql',
  'driver' => 'sparql',
  // Optional. This is actually the endpoint path. If omitted, 'sparql' will
  // be used.
  //'database' => 'data/endpoint',
  // If the connection to the endpoint should be HTTPS secured. If omitted,
  // FALSE is assumed.
  'https' => FALSE,
];

However, it seems not working.