If I use Google Ads API with Java client library it throws the following exception:

io.grpc.ManagedChannelProvider$ProviderNotFoundException: No functional channel service provider found. Try adding a dependency on the grpc-okhttp, grpc-netty, or grpc-netty-shaded artifact     at io.grpc.ManagedChannelProvider.provider(ManagedChannelProvider.java:43)     at io.grpc.ManagedChannelBuilder.forAddress(ManagedChannelBuilder.java:39)     at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createSingleChannel(InstantiatingGrpcChannelProvider.java:325)     at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.access$1800(InstantiatingGrpcChannelProvider.java:81)     at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider$1.createSingleChannel(InstantiatingGrpcChannelProvider.java:231)     at com.google.api.gax.grpc.ChannelPool.create(ChannelPool.java:72)     at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createChannel(InstantiatingGrpcChannelProvider.java:241)     at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.getTransportChannel(InstantiatingGrpcChannelProvider.java:219)     at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:199)     at com.google.ads.googleads.v7.services.stub.GrpcGoogleAdsServiceStub.create(GrpcGoogleAdsServiceStub.java:97)     at com.google.ads.googleads.v7.services.stub.GoogleAdsServiceStubSettings.createStub(GoogleAdsServiceStubSettings.java:185)     at com.google.ads.googleads.v7.services.GoogleAdsServiceClient.<init>(GoogleAdsServiceClient.java:138)     at com.google.ads.googleads.v7.services.GoogleAdsServiceClient.create(GoogleAdsServiceClient.java:119)     at com.google.ads.googleads.lib.catalog.GeneratedCatalog$V7Client.createGoogleAdsServiceClient(GeneratedCatalog.java:4948) 

I'm not sure if it has something to do with how I use the client API. I use other Google APIs where some of them use GoogleSignInAccount, so I extract the access token from the signed in account:

Credentials credentials = OAuth2Credentials.newBuilder()         .setAccessToken(new AccessToken(                 GoogleAuthUtil.getToken(mContext,                         GoogleSignIn.getLastSignedInAccount(mContext).getAccount(),                         "oauth2:" + scope)),                 // Set expiration time in one hour, as credentials are created every time                 // this method is called.                 new Date(System.currentTimeMillis() + 60 * 60 * 1000))         .build(); GoogleAdsClient client = GoogleAdsClient.newBuilder()         .setCredentials(mAuthorizationService.getCredentials(SCOPE_ADWORDS))         .setDeveloperToken(mDeveloperToken)         .build(); String query = "SELECT metrics.cost_micros"         + "FROM campaign "         + "WHERE segments.date BETWEEN '" + getDate(start) + "' AND '" + getDate(end) + "' "; SearchGoogleAdsRequest request = createRequest(client, query); try (GoogleAdsServiceClient googleAdsService = createServiceClient(client)) {     GoogleAdsServiceClient.SearchPagedResponse response = googleAdsService.search(request); } 

The last line is where the exception is raised.