Slot contains the information to identify an inventory slot.
// An inventory slot
message Slot {
// ID of the merchant for the slot (required for CreateBooking)
string merchant_id = 1;
// ID of the merchant service (required for CreateBooking)
string service_id = 2;
// Start time of the appointment slot in seconds of UTC time since Unix epoch.
// (required for CreateBooking)
google.protobuf.Timestamp start_time = 3;
// Duration of the appointment slot (required for CreateBooking)
google.protobuf.Duration duration = 4;
// Opaque tag that identifies the availability slot and matches the value
// provided in the availability feed (optional)
string availability_tag = 5;
// The set of resources that disambiguates the appointment slot, e.g. by
// indicating the staff member and room selected by the user (optional)
Resources resources = 6;
reserved 7;
}