If you purchased your scooter after October 2020, you may have a unique identifying serial number for your scooter.
Most scooters should have the serial number printed on the bottom of the deck of the scooter, although you can also find it printed on the box as pictured below:
The serial number for this specific scooter is City2101101 with "City" being the model of the scooter of course. Other scooters will have their model number printed accordingly, for example "Explore" or "Ghost" followed by their unique number.
The code above - Apo/Cit/48V/13ah/NA - is the SKU for the scooter, and is will be the same for all other scooters of the same spec and model. So this will not be useful for a unique identifying code.
Please note that Apollo does not keep a handy list of all serial numbers, so it's best to mark this number down in a secure place as soon as you receive your scooter.