diff --git a/packages/google-cloud-securitycenter/src/v1/security_center_client.ts b/packages/google-cloud-securitycenter/src/v1/security_center_client.ts
index c7809e94b59..b69f99af5be 100644
--- a/packages/google-cloud-securitycenter/src/v1/security_center_client.ts
+++ b/packages/google-cloud-securitycenter/src/v1/security_center_client.ts
@@ -133,6 +133,12 @@ export class SecurityCenterClient {
     // Save the auth object to the client, for use by other methods.
     this.auth = this._gaxGrpc.auth as gax.GoogleAuth;
 
+    // Set useJWTAccessWithScope on the auth object.
+    this.auth.useJWTAccessWithScope = true;
+
+    // Set defaultServicePath on the auth object.
+    this.auth.defaultServicePath = staticMembers.servicePath;
+
     // Set the default scopes in auth client if needed.
     if (servicePath === staticMembers.servicePath) {
       this.auth.defaultScopes = staticMembers.scopes;
@@ -5693,6 +5699,7 @@ export class SecurityCenterClient {
       return this.securityCenterStub!.then(stub => {
         this._terminated = true;
         stub.close();
+        this.operationsClient.close();
       });
     }
     return Promise.resolve();
diff --git a/packages/google-cloud-securitycenter/src/v1beta1/security_center_client.ts b/packages/google-cloud-securitycenter/src/v1beta1/security_center_client.ts
index 5d1412ee9cc..3b93e9ee0c1 100644
--- a/packages/google-cloud-securitycenter/src/v1beta1/security_center_client.ts
+++ b/packages/google-cloud-securitycenter/src/v1beta1/security_center_client.ts
@@ -133,6 +133,12 @@ export class SecurityCenterClient {
     // Save the auth object to the client, for use by other methods.
     this.auth = this._gaxGrpc.auth as gax.GoogleAuth;
 
+    // Set useJWTAccessWithScope on the auth object.
+    this.auth.useJWTAccessWithScope = true;
+
+    // Set defaultServicePath on the auth object.
+    this.auth.defaultServicePath = staticMembers.servicePath;
+
     // Set the default scopes in auth client if needed.
     if (servicePath === staticMembers.servicePath) {
       this.auth.defaultScopes = staticMembers.scopes;
@@ -3721,6 +3727,7 @@ export class SecurityCenterClient {
       return this.securityCenterStub!.then(stub => {
         this._terminated = true;
         stub.close();
+        this.operationsClient.close();
       });
     }
     return Promise.resolve();
diff --git a/packages/google-cloud-securitycenter/src/v1p1beta1/security_center_client.ts b/packages/google-cloud-securitycenter/src/v1p1beta1/security_center_client.ts
index eb476ff8637..862f4607248 100644
--- a/packages/google-cloud-securitycenter/src/v1p1beta1/security_center_client.ts
+++ b/packages/google-cloud-securitycenter/src/v1p1beta1/security_center_client.ts
@@ -133,6 +133,12 @@ export class SecurityCenterClient {
     // Save the auth object to the client, for use by other methods.
     this.auth = this._gaxGrpc.auth as gax.GoogleAuth;
 
+    // Set useJWTAccessWithScope on the auth object.
+    this.auth.useJWTAccessWithScope = true;
+
+    // Set defaultServicePath on the auth object.
+    this.auth.defaultServicePath = staticMembers.servicePath;
+
     // Set the default scopes in auth client if needed.
     if (servicePath === staticMembers.servicePath) {
       this.auth.defaultScopes = staticMembers.scopes;
@@ -5669,6 +5675,7 @@ export class SecurityCenterClient {
       return this.securityCenterStub!.then(stub => {
         this._terminated = true;
         stub.close();
+        this.operationsClient.close();
       });
     }
     return Promise.resolve();