bug: hard crash after calling signInWithPhoneNumber

[simonpeters]

Plugin version:
0.4.1

Platform(s):
Android

Current behavior:
App crashes after calling signInWithPhoneNumber. It's a hard crash where the app shuts down. I pasted the logCat logs below.

Steps to reproduce:

const { verificationId } = await FirebaseAuthentication.signInWithPhoneNumber(
      {
        phoneNumber: phoneNr
      }
    );

Other information:

 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void dev.robingenz.capacitorjs.plugins.firebase.auth.handlers.PhoneAuthProviderHandler.signIn(com.getcapacitor.PluginCall)' on a null object reference
        at dev.robingenz.capacitorjs.plugins.firebase.auth.FirebaseAuthentication.signInWithPhoneNumber(FirebaseAuthentication.java:118)
        at dev.robingenz.capacitorjs.plugins.firebase.auth.FirebaseAuthenticationPlugin.signInWithPhoneNumber(FirebaseAuthenticationPlugin.java:104)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:121) 
        at com.getcapacitor.Bridge.lambda$callPluginMethod$0$Bridge(Bridge.java:592) 
        at com.getcapacitor.-$$Lambda$Bridge$25SFHybyAQk7zS27hTVXh2p8tmw.run(Unknown Source:8) 
        at android.os.Handler.handleCallback(Handler.java:938) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:250) 
        at android.os.HandlerThread.run(HandlerThread.java:67) 

Capacitor doctor:

    Latest Dependencies:
    
      @capacitor/cli: 3.4.1
      @capacitor/core: 3.4.1
      @capacitor/android: 3.4.1
      @capacitor/ios: 3.4.1
    
    Installed Dependencies:
    
      @capacitor/cli: 3.4.1
      @capacitor/core: 3.4.1
      @capacitor/android: 3.4.1
      @capacitor/ios: 3.4.1

[simonpeters]

For anyone else running into this problem. it was caused by not setting up my providers properly in capacitor.config.json