Getting jobid of a private server externally

Hello roblox community!
I’m currently making roblox web sdk on php and i’m facing a problem.
First of all, here is the join link: roblox-player:1 launchmode:play gameinfo:AUTHTOKEN launchtime:1649434682449 placelauncherurl: robloxLocale:en_us gameLocale:en_us channel:
The game wouldn’t launch if ACCESSCODE is nil or wrong, it’s formated like jobid so, here is my question, how to get private servers jobid by linkcode?

or if there is no solution then tell me how to join to private server from game with link code