error.log

    com.google.android.gms.common.api.ApiException: 4: The user must be signed in to make this API call.
        at com.google.android.gms.common.internal.ApiExceptionUtil.fromStatus(com.google.android.gms:play-services-base@@18.0.0:3)
        at com.google.android.gms.common.internal.zap.onComplete(com.google.android.gms:play-services-base@@18.0.0:4)
        at com.google.android.gms.common.api.internal.BasePendingResult.zab(com.google.android.gms:play-services-base@@18.0.0:7)
        at com.google.android.gms.common.api.internal.BasePendingResult.setResult(com.google.android.gms:play-services-base@@18.0.0:6)
        at com.google.android.gms.common.api.internal.BaseImplementation$ApiMethodImpl.setFailedResult(com.google.android.gms:play-services-base@@18.0.0:5)
        at com.google.android.gms.common.api.internal.zae.zad(com.google.android.gms:play-services-base@@18.0.0:1)
        at com.google.android.gms.common.api.internal.zabq.zaE(com.google.android.gms:play-services-base@@18.0.0:7)
        at com.google.android.gms.common.api.internal.zabq.zaD(com.google.android.gms:play-services-base@@18.0.0:2)
        at com.google.android.gms.common.api.internal.zabq.zar(com.google.android.gms:play-services-base@@18.0.0:12)
        at com.google.android.gms.common.api.internal.zabq.zas(com.google.android.gms:play-services-base@@18.0.0:3)
        at com.google.android.gms.common.api.internal.zabu.zae(com.google.android.gms:play-services-base@@18.0.0:2)
        at com.google.android.gms.common.api.internal.zact.zad(com.google.android.gms:play-services-base@@18.0.0:10)
        at com.google.android.gms.common.api.internal.zacr.run(com.google.android.gms:play-services-base@@18.0.0:1)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:233)
        at android.os.Looper.loop(Looper.java:344)
        at android.os.HandlerThread.run(HandlerThread.java:67)