Zoho CRM Appointments how to get Appointment ID

Zoho CRM Appointments how to get Appointment ID

Hello Zoho Support,

I've been trying to create a Function for the Appointments Module but I get the error message: "INVALID_MODULE". I'm using the API Name: "Appointments__s", that I get from: CRM API/API names

Here is the Function:
AppointmentData = zoho.crm.getRecordById("Appointments__s", AppointmentID);
info AppointmentData;

This is the result:
{"code":"INVALID_MODULE","details":{},"message":"the module name given seems to be invalid","status":"error"}

Could you please help me?