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

It may be helpful for you-

You can use callback url as https://www.google.com/ for testing purpose. If you are designing app for a particular Organisation than put that organisation url - Example- http://www.fortishealthcare.com