Zoho meeting api not working in trial version

Zoho meeting api not working in trial version

I have and free trial meeting access.
When i have tried to create a authentication code for meeting it shows Invalid OAuth Scope error.

My code:

$client_id = 'client_id';
$redirect_uri = 'site_url';
$scope = 'ZohoMeeting.organize.CREATE,ZohoMeeting.organize.READ';

$auth_url = "https://accounts.zoho.com/oauth/v2/auth?" . http_build_query([ 'response_type' => 'code', 'client_id' => $client_id, 'scope' => $scope, 'redirect_uri' => $redirect_uri, 'access_type' => 'offline', // Offline access for refresh tokens ]); 

header("Location: $auth_url");