What should I enter in Valid redirect URIs on instagram?

Question

Instagram

Good afternoon, I'm learning swift and according to the lesson, to use instagram you need to register and set up the application in the developer section.
There is a text field Valid redirect URI what is it?
I don’t have a site for this, and I’m not going to use the site only in the application.
In the video tutorial, the path was instafeed://auth/instagram but it doesn't work.