[Jstylezzz]

A faction is not like a function, 1.2.3. done.. Factions are imaginative things, bound together by a number, some commands that only work if your player has a saved variable that binds them to the specific number, and a skin (most of the times).

So, the only advise that I have for you at this moment, is the following:

• Save the faction number for a player in the player's savedata
• Load the data into a variable when the player logs in
• Make commands that only work if the faction variable of the player is the same as the faction number

I know this may seem unclear, but this is, in short, what factions, shop items and owned cars are all about; Variables that are linked throughout the script.