Simple MMO possible in Photon Unity Networking?

Hi all, Im trying to make a simple top-down MMO. Think of it like a slightly more complex agar.io (diep.io to be more precise since it will be vehicles with weapons), where i want to have at least 50-100 people per instance, but i also want to save the "gold/score" the player achieves between play sessions. So i would need some kind of persistence and to have an authoritative server to prevent easy hacking if im not mistaken. Is this possible with Photon Unity Networking (using the cloud) or I need to look into photon server?

Thank you ver much in advance!