How to receive user_id in the callback?

[akshatdalton]

Hi, when I'm constructing the oauth link:

https://api.typeform.com/oauth/authorize?client_id={your_client_id}&redirect_uri=https://results-example.herokuapp.com/callback&scope={scope1}+{scope2}+{scope3}

like this, how can I send user_id above so that I receive the same user_id in the callback request? I have a condition where I want to associate typeform data with the users data I have in my db.