Im developing an iOS app using Xamarin that coects to the Fitbit Api. Im currently working on authenticating the user. Basically, the app will redirect the user to the Fitbit login page which im opening in a SFSafariViewController as per Fitbit guidlines, that part works fine, the problem is when Im trying to put my apps custom url (applinks://com.companyname.appname) as the redirect url, But Fitbit doesnt accept that as a valid url.
What would be the best way to redirect the user back to the app after successfully logging in, and also pass some parameters to my app (ie. Token etc..)?