Setting up Fitbit api in xcode Swift

Question

I am trying to setup the Fitbit api from dev.fitbit.com The first part is to register an application and I am stuck in this part already:

For example: I have no

Answer 1

Callback URL is the URL scheme which is used to redirect the user back to the application from the browser after getting logged in.

Callback URL can be any string or name of the app in the following format "demoapp://something"

In project target Info, put the name of the app or the prefix of "://" from Callback URL in URL scheme here