stacktrace

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.toursprung.bikemap, PID: 28576
    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=10, result=-1, data=Intent { (has extras) }} to activity {com.toursprung.bikemap/com.toursprung.bikemap.ui.auth.AuthenticationActivity}: kotlin.KotlinNullPointerException
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4491)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:4534)
        at android.app.ActivityThread.-wrap20(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1752)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
     Caused by: kotlin.KotlinNullPointerException
        at com.toursprung.bikemap.ui.auth.AuthenticationActivity.onActivityResult(AuthenticationActivity.kt:79)
        at android.app.Activity.dispatchActivityResult(Activity.java:7547)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4487)