firebaseの、Authenticationでログインができません。

できなくなった理由としましては、
行なった作業が2つあり、
1つは、package名を変更したこと
２つ目は、firestoreをコードの中に入れたこと(firebaseにログイン情報を保存していたのをfirestoreに変更しようとしました。

何が原因かわからずに詰まっています。アドバイスをいただけないでしょうか？


12-11 19:00:38.636 1653-2466/? E/ActivityThread: Failed to find provider info for com.android.contacts.metadata
12-11 19:00:44.316 2902-2902/? E/ActivityThread: Service com.android.email.service.EmailBroadcastProcessorService has leaked ServiceConnection com.android.emailcommon.service.as@b72d139 that was originally bound here
                                                 android.app.ServiceConnectionLeaked: Service com.android.email.service.EmailBroadcastProcessorService has leaked ServiceConnection com.android.emailcommon.service.as@b72d139 that was originally bound here
                                                     at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:1095)
                                                     at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:989)
                                                     at android.app.ContextImpl.bindServiceCommon(ContextImpl.java:1324)
                                                     at android.app.ContextImpl.bindService(ContextImpl.java:1307)
                                                     at android.content.ContextWrapper.bindService(ContextWrapper.java:611)
                                                     at com.android.emailcommon.service.aq.a(SourceFile:181)
                                                     at com.android.emailcommon.service.aq.e(SourceFile:224)
                                                     at com.android.email.service.l.c(SourceFile:168)
                                                     at com.android.email.provider.b.a(SourceFile:201)
                                                     at com.android.email.provider.b.a(SourceFile:145)
                                                     at com.android.email.service.EmailBroadcastProcessorService.c(SourceFile:347)
                                                     at com.android.email.service.EmailBroadcastProcessorService.onHandleIntent(SourceFile:1332)
                                                     at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:66)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:148)
                                                     at android.os.HandlerThread.run(HandlerThread.java:61)
12-11 19:02:28.757 4415-4415/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                 Process: com.google.android.exoplayer2.demo, PID: 4415
                                                 java.lang.RuntimeException: Unable to instantiate receiver com.google.android.exoplayer2.demo.PowerStatusReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference
                                                     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2746)
                                                     at android.app.ActivityThread.access$1900(ActivityThread.java:153)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1437)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:148)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5480)
                                                     at java.lang.reflect.Method.invoke(Native Method)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                  Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference
                                                     at com.google.android.exoplayer2.demo.PowerStatusReceiver.<init>(PowerStatusReceiver.java:40)
                                                     at java.lang.Class.newInstance(Native Method)
                                                     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2741)
                                                     at android.app.ActivityThread.access$1900(ActivityThread.java:153) 
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1437) 
                                                     at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                     at android.os.Looper.loop(Looper.java:148) 
                                                     at android.app.ActivityThread.main(ActivityThread.java:5480) 
                                                     at java.lang.reflect.Method.invoke(Native Method) 
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)