'', 'client_secret' => '', 'redirect_uri' => '/callback.php', 'scopes' => 'offline_access user.read calendars.readwrite', 'auth_url' => 'https://login.microsoftonline.com//oauth2/v2.0/authorize', 'token_url' => 'https://login.microsoftonline.com//oauth2/v2.0/token', 'graph_url' => 'https://graph.microsoft.com/v1.0', 'token_storage' => __DIR__ . '/tokens.json', ];