i am getting this exception, can someone helop please? thank you
Exception in thread "main" com.google.api.gax.rpc.UnavailableException: io.grpc.StatusRuntimeException: UNAVAILABLE: Credentials failed to obtain metadata at com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:69) at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:72) at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:60) at com.google.api.gax.grpc.ExceptionResponseObserver.onErrorImpl(ExceptionResponseObserver.java:82) at com.google.api.gax.rpc.StateCheckingResponseObserver.onError(StateCheckingResponseObserver.java:86) at com.google.api.gax.grpc.GrpcDirectStreamController$ResponseObserverAdapter.onClose(GrpcDirectStreamController.java:149) at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) at com.google.ads.googleads.lib.logging.LoggingInterceptor$1$1.onClose(LoggingInterceptor.java:111) at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:700) at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:399) at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:510) at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:66) at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:630) at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:518) at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:692) at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:681) at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266) at java.util.concurrent.FutureTask.run(FutureTask.java) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Suppressed: java.lang.RuntimeException: Asynchronous task failed at com.google.api.gax.rpc.ServerStreamIterator.hasNext(ServerStreamIterator.java:105) at com.google.ads.googleads.examples.basicoperations.GetCampaigns.runExample(GetCampaigns.java:103) at com.google.ads.googleads.examples.basicoperations.GetCampaigns.main(GetCampaigns.java:64) Caused by: io.grpc.StatusRuntimeException: UNAVAILABLE: Credentials failed to obtain metadata at io.grpc.Status.asRuntimeException(Status.java:533) ... 29 more Caused by: com.google.api.client.http.HttpResponseException: 400 Bad Request { "error": "invalid_grant", "error_description": "Bad Request" } at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1097) at com.google.auth.oauth2.UserCredentials.refreshAccessToken(UserCredentials.java:197) at com.google.auth.oauth2.OAuth2Credentials.refresh(OAuth2Credentials.java:157) at com.google.auth.oauth2.OAuth2Credentials.getRequestMetadata(OAuth2Credentials.java:145) at com.google.auth.Credentials.blockingGetToCallback(Credentials.java:112) at com.google.auth.Credentials$1.run(Credentials.java:98) ... 8 more Disconnected from the target VM, address: -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. 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