Understanding oauth access token

Hi, trying to understand how to use the oauth flow…
when the user install my app, Monday redirects him to my “redirect uri”.
then, I’m getting successfully the access_token.
what I don’t understand is on behalf of what account id should I store this token? I didn’t get any additional data about the user/account…

@ShellyEldman
Hi,
I am new to Monday.com
I created an app in monday.com in which I am using app hardcoded client id and client secret to generate access token.

My question is when we install this app in other monday account then how we will get the dynamic client id and client secret.

Thanks