Where do I get tracking code?

[nguyentrong101094]

In this step, I have to fill in Android Tracking code https://developers.google.com/analytics/devguides/collection/unity/v4/devguide#prefab

But on my Google Analytics' dashboard, I can't find any tracking code. I followed these steps https://support.google.com/analytics/answer/7476135?hl=en Apparently, only Web property has tracking code, App does not have tracking code

Then what do I fill in those fields?