configure firebase with options is crashing in Xcode 11 and Firebase 6.19

I'm trying to register a second firebase application in my app. The first one is correctly registered inside didFinishWithLaunchingWithOptions method (by default is using the GoogleService-Info.plist)

FirebaseApp.configure()

Then I need to retrieve a new googleAppId from a server and configure a new application using this new googleAppId and using my iOSID of curse. I am doing all this registration inside AppDelegate. I'm registering this way:

let options = FirebaseOptions(googleAppID: String(format: "1:%a:ios:%a", googleID, iOSID), gcmSenderID: googleID)
//Deleting the first app in order to register the second
let app = FirebaseApp.app()
app?.delete { _ in }
FirebaseApp.configure(options: options)

It was working well until I update my firebase version from 6.2 to 6.19, now the app is crashing in FirebaseApp.configure(options: options)

The log says:

    Terminating app due to uncaught exception 'com.firebase.installations', reason
    '[Firebase/Installations][I-FIS008000] Could not confiure Firebase Installations die to invalid 
    Firebase options. The following parameters are nil or empty: `FirebaseOptions.APIKEY`. If you
    use GoogleServices-Info.plist please download the most recent version from the Firebase Console. 
    If you configure Firebase in code, please make sure you specify all required paramaters.

Is worth mencioning that a new Framework was added to Analytics in Firebase version 6.15 so I had to added it in order to make my app compile again.

I also tried to add a new parameter inside the FirebaseOptions but is still asking for the same parameters, it is not expecting an APIKEY which i don't know where to get it

Solution

The message comes from here as far as I can see. The check done there shows that these three values must always be specified:

  if (appName.length < 1) {
    [missingFields addObject:@"`FirebaseApp.name`"];
  }
  if (appOptions.APIKey.length < 1) {
    [missingFields addObject:@"`FirebaseOptions.APIKey`"];
  }
  if (appOptions.googleAppID.length < 1) {
    [missingFields addObject:@"`FirebaseOptions.googleAppID`"];
  }

From the error message and your code it looks like you're not specifying the APIKEY in your FirebaseOptions, which is required according to the SDK.