How to do it...

After installing the needed dependencies, let's start adding our logic to support the needed behavior. Within our application, I would like to test if adding Google Sign-in will affect my user base or not, so what I'm doing is integrating Firebase Remote Config within my application so I simply have a dynamic render for my testing purposes:

Figure 26: iOS application before adding the Firebase Remote Config

Head directly to your LoginViewController and import Firebase, if you haven't done that already:

       import Firebase

Now, within the viewDidLoaded() function, we will need to implement the Firebase Remote Config in order to ...

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