Solved How to read a JSon file by value ?

Hi, to fix the last bug of my mod i need to find a way to save 1 value by vehicle and this value contain the vehicle ID.
And when the user reload the vehicle i want it to search if the JSon file contain this ID.

I did this:

Code:

local latestConfig = readJsonFile("/mods/---/config/latestConfig.json") --Read the JSon file

local vehicleID = **Code to get the vehicle ID**

serializeJsonToFile("mods/---/config/latestConfig.json", vehicleID, true) --Add the vehicleID to the Json file

vehicleConfig = latestConfig.vehicleID
--But here it say me that i can't. Because he search for a value that is called "vehicheID" in the JSon file, but i want it to search latestConfig.9536    (9536 = vehicleID)

I don't know if you see what i am trying to do but if someone know how to "call a value by value" (like latestConfig.myValue1 = test)
It's complicated to explain ^^