wixBookings : number of participant custom form field id needed

Bookings/Services collection shows Name,Email,Phone in FormField…but I want to capture “number of visitors” field and I have checked all documents on wix bookings but no luck. All I want is just the field id to capture “More than one participant”.


current fields are Name and Email, I want to know Label of "Number of Participants" so I can book for multiple people by one person

 let formFields = [{
 // Set _id to the ID of the name field.
 _id: getFieldId(service, "Name"),
 // Set value to the name the user entered.
 value: pendingRequest.name
 },
 {
 // Set _id to the ID of the email field.
 _id: getFieldId(service, "Email"),
 // Set value to the email address the user entered.
 value: pendingRequest.email
 }
 ];

folks, any pointers…

Any pointers pls… it looks like a bug
Services table form field doesn’t have the label “Number of Visitors”

// Get a field ID from a service for a given label.
function getFieldId(service, label) {
 return service.form.fields.filter(field => field.label === label)[0]._id;
}