diff --git a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/OsLoginServiceSettings.java b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/OsLoginServiceSettings.java
index f3058d3c..6ba45009 100644
--- a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/OsLoginServiceSettings.java
+++ b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/OsLoginServiceSettings.java
@@ -186,14 +186,13 @@ public OsLoginServiceStubSettings.Builder getStubSettingsBuilder() {
       return ((OsLoginServiceStubSettings.Builder) getStubSettings());
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(
           getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
       return this;
diff --git a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/GrpcOsLoginServiceStub.java b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/GrpcOsLoginServiceStub.java
index e332d6c6..5ecbea31 100644
--- a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/GrpcOsLoginServiceStub.java
+++ b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/GrpcOsLoginServiceStub.java
@@ -21,7 +21,6 @@
 import com.google.api.gax.grpc.GrpcCallSettings;
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
-import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.oslogin.common.OsLoginProto;
 import com.google.cloud.oslogin.v1.DeletePosixAccountRequest;
@@ -38,7 +37,6 @@
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
-import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -171,39 +169,30 @@ protected GrpcOsLoginServiceStub(
         GrpcCallSettings.<DeletePosixAccountRequest, Empty>newBuilder()
             .setMethodDescriptor(deletePosixAccountMethodDescriptor)
             .setParamsExtractor(
-                new RequestParamsExtractor<DeletePosixAccountRequest>() {
-                  @Override
-                  public Map<String, String> extract(DeletePosixAccountRequest request) {
-                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                    params.put("name", String.valueOf(request.getName()));
-                    return params.build();
-                  }
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
                 })
             .build();
     GrpcCallSettings<DeleteSshPublicKeyRequest, Empty> deleteSshPublicKeyTransportSettings =
         GrpcCallSettings.<DeleteSshPublicKeyRequest, Empty>newBuilder()
             .setMethodDescriptor(deleteSshPublicKeyMethodDescriptor)
             .setParamsExtractor(
-                new RequestParamsExtractor<DeleteSshPublicKeyRequest>() {
-                  @Override
-                  public Map<String, String> extract(DeleteSshPublicKeyRequest request) {
-                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                    params.put("name", String.valueOf(request.getName()));
-                    return params.build();
-                  }
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
                 })
             .build();
     GrpcCallSettings<GetLoginProfileRequest, LoginProfile> getLoginProfileTransportSettings =
         GrpcCallSettings.<GetLoginProfileRequest, LoginProfile>newBuilder()
             .setMethodDescriptor(getLoginProfileMethodDescriptor)
             .setParamsExtractor(
-                new RequestParamsExtractor<GetLoginProfileRequest>() {
-                  @Override
-                  public Map<String, String> extract(GetLoginProfileRequest request) {
-                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                    params.put("name", String.valueOf(request.getName()));
-                    return params.build();
-                  }
+                request -> {
+                  ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                  params.put("name", String.valueOf(request.getName()));
+                  return params.build();
                 })
             .build();
     GrpcCallSettings<GetSshPublicKeyRequest, OsLoginProto.SshPublicKey>
@@ -211,13 +200,10 @@ public Map<String, String> extract(GetLoginProfileRequest request) {
             GrpcCallSettings.<GetSshPublicKeyRequest, OsLoginProto.SshPublicKey>newBuilder()
                 .setMethodDescriptor(getSshPublicKeyMethodDescriptor)
                 .setParamsExtractor(
-                    new RequestParamsExtractor<GetSshPublicKeyRequest>() {
-                      @Override
-                      public Map<String, String> extract(GetSshPublicKeyRequest request) {
-                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                        params.put("name", String.valueOf(request.getName()));
-                        return params.build();
-                      }
+                    request -> {
+                      ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                      params.put("name", String.valueOf(request.getName()));
+                      return params.build();
                     })
                 .build();
     GrpcCallSettings<ImportSshPublicKeyRequest, ImportSshPublicKeyResponse>
@@ -225,13 +211,10 @@ public Map<String, String> extract(GetSshPublicKeyRequest request) {
             GrpcCallSettings.<ImportSshPublicKeyRequest, ImportSshPublicKeyResponse>newBuilder()
                 .setMethodDescriptor(importSshPublicKeyMethodDescriptor)
                 .setParamsExtractor(
-                    new RequestParamsExtractor<ImportSshPublicKeyRequest>() {
-                      @Override
-                      public Map<String, String> extract(ImportSshPublicKeyRequest request) {
-                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                        params.put("parent", String.valueOf(request.getParent()));
-                        return params.build();
-                      }
+                    request -> {
+                      ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                      params.put("parent", String.valueOf(request.getParent()));
+                      return params.build();
                     })
                 .build();
     GrpcCallSettings<UpdateSshPublicKeyRequest, OsLoginProto.SshPublicKey>
@@ -239,13 +222,10 @@ public Map<String, String> extract(ImportSshPublicKeyRequest request) {
             GrpcCallSettings.<UpdateSshPublicKeyRequest, OsLoginProto.SshPublicKey>newBuilder()
                 .setMethodDescriptor(updateSshPublicKeyMethodDescriptor)
                 .setParamsExtractor(
-                    new RequestParamsExtractor<UpdateSshPublicKeyRequest>() {
-                      @Override
-                      public Map<String, String> extract(UpdateSshPublicKeyRequest request) {
-                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
-                        params.put("name", String.valueOf(request.getName()));
-                        return params.build();
-                      }
+                    request -> {
+                      ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                      params.put("name", String.valueOf(request.getName()));
+                      return params.build();
                     })
                 .build();
 
@@ -319,7 +299,13 @@ public UnaryCallable<GetLoginProfileRequest, LoginProfile> getLoginProfileCallab
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/OsLoginServiceStubSettings.java b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/OsLoginServiceStubSettings.java
index 8b5366b7..8eab9abc 100644
--- a/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/OsLoginServiceStubSettings.java
+++ b/google-cloud-os-login/src/main/java/com/google/cloud/oslogin/v1/stub/OsLoginServiceStubSettings.java
@@ -356,14 +356,13 @@ private static Builder initDefaults(Builder builder) {
       return builder;
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
       return this;
     }
diff --git a/synth.metadata b/synth.metadata
index c533afd4..4cb80d49 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-os-login.git",
-        "sha": "9ecaf22e2c0ab128092dbb24e768f1953e16f20f"
+        "sha": "720f363dd47cc39a35b4eced103a87aba35d1705"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "551681f25e36b11829e87e580281350461f4f3f5",
-        "internalRef": "379784268"
+        "sha": "d9eaf41de44d953458b18712a3f240bb4c564e48",
+        "internalRef": "388535346"
       }
     },
     {